Hello Clair Wilson, welcome to Microsoft Q&A forum.
The AI answer covers the main troubleshooting steps. One additional thing to check:
Since you mentioned she still shows up in the Family Safety app on your phone but not on your laptop, there's a sync issue between devices. Have your daughter check from her side:
- She should go to account.microsoft.com, sign in with her Microsoft account
- Click "Family" in the menu
- If she sees an old family group listed there, she needs to leave it herself
Also, after you remove her from family.microsoft.com, wait 24-48 hours before trying to re-invite her. Microsoft's systems can take time to fully process the removal across all services.