Despite becoming worthy again, Thor noticed
Thor once again takes possession of Mjolnir following Foster's death. In the end, Thor adopts Love, who has been restored from death by Eternity, and Thor gives Love Stormbreaker while reclaiming use of the restored Mjölnir and wielding it for himself.
Ultimately, Love and Thunder confirms that the God of Thunder is still worthy as Thor wields Mjolnir once more, but the delay both helps Jane and proves Thor's worthiness on a much deeper level.
Thor's power has no worthiness enchantment on it, that was only Mjolnir, which is not the source of Thor's power (to quote Odin, “Are you the God of Hammers?”) Thor's new weapon, Stormbreaker, has no worthiness enchantment either.
The short answer is yes, Thor is still worthy of lifting Mjolnir after Thor: Love and Thunder. His worthiness comes down to the reason why Mjolnir chose Jane. In the comic books, Mjolnir does choose Jane to be Thor after Thor becomes unworthy and is unable to lift it.
The Power of Love — Red Norvell
He was tricked by Loki into attempting to usurp Thor's power, but failed. In this process, however, Red proved himself more than worthy of the power of Thor, because of his noble, obedient, and self-sacrificing nature.
In a moment of wistful affection for his girlfriend, Thor asked his trusty hammer to always protect Jane, and in doing so unwittingly enchanted Mjolnir to do just that. Just like Thor's father Odin once enchanted the hammer to only be lifted by someone who is worthy, Thor cast a spell that let Jane use its powers.
Originally there was no restriction placed on the hammer for who can use it but after Thor's reckless behavior, Odin Borson placed an enchantment on it. This spell read "Whosoever holds this hammer, if he be worthy, shall possess the power of Thor." Only those deemed worthy to lift Mjolnir can.
Thor Odinson initially suspects Jane might be this new hero. But he eliminates her from his list of suspects because she is going through chemotherapy for breast cancer, which, he reasons, would make her too weak to fight.
Overall, though, Stormbreaker seems to have the edge over Mjolnir once again. Strong enough to open the Bifrost, reach Eternity, and manipulate storms the same way Mjolnir can, Stormbreaker's powers are greater than that of the mythical hammer.
The hammer was used extensively by Thor as his primary weapon until it was destroyed by Hela in 2017. The broken pieces were eventually made into a tourist attraction in New Asgard.
Hence, Mjolnir determines worthiness based on Odin's definition of worthiness. However, since Mjolnir also has a conscious being within it, in the form of God Tempest, another likely explanation is that it is God Tempest that determines the worthiness.
However, the film also implies that the hammer only sees Jane as worthy because Thor unintentionally revised the rules of Mjölnir, giving it the power to protect her. Captain America didn't need anything special for the hammer to see him as worthy – he's able to wield it without issue in Avengers: Endgame.
The general consensus is Thor brought the Vision to life with his lightning bolt and somehow this made the Vision worthy of lifting Mjolnir.
In Love and Thunder, we learn that all the pieces of Mjölnir are kept in New Asgard, as a touristic attraction to those who wish to see the God of Thunder weapon. As a tourist guide reveals, no one was ever able to lift Mjölnir's fragment, indicating that Odin's enchantment is still engraved in the hammer.
In Norse mythology, the hammer Mjolnir is simply too heavy for anyone other than Thor to lift, but over the centuries, the story evolved and even super-strong entities couldn't lift the weapon.
Odin placed several enchantments upon Mjolnir prior to Thor wielding the hammer: This is reflected in the inscription on the side of Mjolnir, which states: Whosoever holds this hammer, if he be worthy, shall possess the power of Thor. For almost the entirety of Marvel continuity, this has exclusively been Thor.
Odin is furious that Thor has dragged Asgard back into war, and tells Thor he is not fit to be king. He strips him of his power, banishes him to Earth and sends his hammer, Mjolnir, after him a few seconds later, saying that whosoever wields the hammer, and is worthy of it, shall have the power of Thor.
One possibility is the simplest one available, which would hinge on the rules put on the hammer by Odin's enchantment, which are “Whoever holds this hammer, if he be worthy, shall possess the power of Thor.” Jane was able to take Thor's place in the comics because she became worthy enough to wield Mjolnir, so if the ...
A happy-go-lucky, ABBA-soundtracked montage, the scene features Thor making Mjolnir promise that it will always protect Jane, no matter what — even if it means coming back from the “dead” after being smashed to pieces by his villainous sister Hela.
Both Jane and Thor started to withdraw from each other, they both were experiencing the loss of their relationship. It was a mutual breakup because they both left each other, yet the love still remained. Often heartbreak can lead someone to harden their hearts to love.
Yes, even Spider-Man has been worthy of holding the hammer of Thor. This is not your father's Spider-Man (well, actually, it could be if your dad was a kid in 1993), but instead is the Spider-Man of Marvel's distant future of 2099!
Interestingly, according to comics, one of Moon Knight's abilities even allows him to control Thor's hammer (Mjolnir) which otherwise only Captain America and Hela could do in previous MCU films.
Hela Understood Mjolnir's Power
That opens the possibility that Hela retained some hold over her former weapon, enabling her to shatter it. We don't know if she bonded with Mjolnir through some sort of Asgardian mysticism, but she possessed the hammer for much longer than Thor did.
It is revealed that Thor and Jane broke up sometime after the events of Avengers: Age of Ultron. When a fangirl tells Thor she's sorry that Jane dumped him, he sheepishly replies that it was a mutual breakup.