If you're having issues syncing your Facebook account on your Apple device, here are a few troubleshooting steps you can try:
Check your internet connection: Make sure your device is connected to the internet and that the connection is stable. If you're using Wi-Fi, try switching to mobile data or vice versa.
Update Facebook: Check if there's a new version of the Facebook app available in the App Store and update it if necessary.
Check Facebook settings: Open the Facebook app on your device and go to Settings > Account Settings > General > Device Management. Make sure your device is listed there and that the toggle next to it is switched on.
Reinstall Facebook: Try deleting the Facebook app from your device and reinstalling it from the App Store.
Restart your device: Sometimes, simply restarting your device can resolve syncing issues.
If the issue persists, you may want to consider reaching out to Apple support as well, as there may be a deeper issue with your device's settings or software.