Dear SamuelSteinhardtYZ,
Welcome to Microsoft Community.
We understand that your OneDrive is having problems syncing.
According to your description, you have tried to relink your OneDrive and change the credential information, but the synchronization file still shows errors and deviations. And files with other extensions cannot be synchronized and uploaded.
Did you see an error when uploading? Or did nothing happen after uploading?
You have performed all the operations but still cannot get an error. In order to troubleshoot the detection and information of the OneDrive program in your system, you can help us try the following:
Reset your OneDrive:
(Before resetting your OneDrive, please make sure your files have been synced or backed up successfully to avoid the reset affecting your files)
You can refer to the detailed information in the following link to help you reset OneDrive:
Reset OneDrive - Microsoft Support
Create a new local system account:
You can try to create a new local administrator account for the system, use the new administrator account to log in to the system and open the OneDrive program.
You can refer to the detailed steps in the following link to create a new local account:
Manage user accounts in Windows - Microsoft Support

Please understand that our initial response may not always resolve your issue immediately. However, we will also respond based on your subsequent help and more detailed information so that we can find a solution together.
Best Regards,
Zenobia.Z | Microsoft Community Support Specialist