Windows Phone 10 Achievements not syncing to Xbox Live Profiles since the update to the new...

Ever since the new xbox windows 10 app started rolling out onto windows 10 devices to replace the xbox companion app, any xbox achievements unlocked on Windows Phone 10 will not sync to your xbox live profile. Simply put, achievements will unlock on Windows
Phone 10 but won't ever sync them to your xbox live profile as being unlocked. Even if you still keep the old companion app and don't update it still doesn't sync. It really seems like that the release of the new xbox windows 10 app, it broke the way of how
Windows Phone 10 achievements are synced with xbox live profiles.

The last recorded sync I've seen is October 29th 2020, since then no one else has been able to sync their achievements with their xbox live profile.

On a side note Windows Phone 7, 8 and 8.1 achievement syncing has been broken since March 2020 and that still hasn't been fixed, information regarding that is here:

https://answers.microsoft.com/en-us/xbox/forum/xba_modi/windows-phone-7-8-and-81-achievements-not-syncing/a57e7af9-4ada-47e1-bf04-b2c624209edb?tm=1595938208733

This is a service issue that is happening on all WP10 devices and is something that can fixed by fixing your backend.

Everyone is having this issue, I hope Microsoft takes this issue seriously and fixes it soon.

:)