To separate your Apple ID from Family Sharing, open Settings > [Your Name] > Family, then tap your name and select Stop Using Family Sharing; this removes you as a member, but for a complete split where you also remove your account, sign in to appleid.apple.com and disconnect your account from the Family Sharing section. This process stops shared access to purchases, subscriptions, and location, and you'll need to create a new Apple ID or sign out of the old one if you're sharing the same account entirely.
Leave a Family Sharing group
Creation of New Apple IDs
Another way to effectively split up the main Apple ID account is to create new Apple IDs for family members who don't have third-party email addresses. This includes your kids even if you've already created aliases for them in the main Apple ID.
How to separate our Apple IDs and share things explicitly?
How to delete family sharing
Remove yourself from a Family Sharing group
If you want to share purchases or subscriptions with family, use Family Sharing. Each person should use their own Apple Account.
Q: Why Are My Two iPhones Linked? A: Your two iPhones may be linked together to synchronise iTunes and iCloud data while allowing all purchased apps to be visible on both devices. This may be essential for someone with two phones for different uses but wants to retain personal information on both.
Remove member.
Add a family member with an Apple Account
Family members will no longer be able to share access to subscriptions, purchases, and other services enabled through Family Sharing. Any family member over the age of 13 can remove themselves from a family group at any time. Just select your name and then select Leave Family.
How to stop sharing with your family
Method 1: Using Your iPad or iPhone
Remove your associated iPhone or iPad
Your iCloud account is a gateway to all your synced data, including text messages. Someone can spy on your messages by: Logging into your iCloud account from another device to view message backups. Using a shared Apple ID (common in families) to receive your iMessages on their device.
The main disadvantages of Apple Family Sharing include privacy concerns with location sharing and device wiping, potential for conflict in custody situations with a single organizer, limitations in controlling shared purchases (like some app subscriptions not working), and complexities with managing apps downloaded under another family member's ID. Sharing passwords for convenience is risky, and not all apps/subscriptions are compatible, while adults lack the detailed activity monitoring available for children.
With Family Sharing, everyone's personal files and preferences stay private. Therefore, family members are not able to view each other's text messages. "When you share iCloud+, family members can't see each others' photos, files, or documents.
After you change the Apple Account that you use for Family Sharing, your family members can access or download purchases from that account. However, they'll no longer be able to access purchases or subscriptions from your previous account.
Open the App Store and tap the My Account button. Tap Create New Apple Account. If you don't see this option, make sure that you're signed out of iCloud. Enter your payment method and billing information, then tap Next.