Why is sync feature not working in my phone? No account is syncing in my android phone since 25 feb 2021.
Already tried

Rebooting
updating all apps
resetting settings only(cannot reset storage)
removing and re adding account.
different internet connections.
tried same google accounts on other android phones, they work  with sync fine.


I can't erase whole data(even after backup), personal reasons.
Phone model : realme 5 pro
Android version : 10
Please help
I removed all my google accounts and added just one google account again. Then it synced. Getting 'access to keep is unauthorised' though. Also 'authentication is required' error was showing in play store.
Then i followed
www.nextpit.com/how-to-fix-google-play-authentication-is-required-error
Go to Settings &gt; Apps &amp; notifications
Scroll down to Google Play Store, tap it, then tap Storage &amp; cache and then Clear cache.
Do the same for Google Play Services
It worked for me.