Please check the template extension, you could not see the template if the extension is not correct, for example:
“.potx” for PowerPoint Template and “.dotx” for word template.
For more information, you could refer to:
https://learn.microsoft.com/en-us/deployoffice/compat/office-file-format-reference
What is the syncing issue happened to Teams and Onedrive? Could you tell me more about it?
I don’t have the environment of MacBook Pro, per my test it works well on windows, you could try it on windows first.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.