Recently I uninstalled then reinstalled Firefox on my Samsung A71 because I couldn't remove a timer I set on the app. I continued using Firefox on Android as usual for about three or four days but tonight I discovered that my Android history isn't syncing up to Windows 10 Firefox on my HP Pavilion. I signed out on Android, then signed back in again but my Android history still didn't appear on Windows. I tried several more times, using both the QR code and my email. I then uninstalled FF on Android and reinstalled and signed back in again but only a few items appeared in my Windows history. Android won't show me my current tabs on Windows as I type this either and the sync now button is doing nothing. Is there anything I can do fix this?

(P.S. both versions are up to date)