A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Same issue here.
Sync worked fine until today on my RedMi Note 10 with Android 12.
I already re-installed OneNote and did remove my Microsoft account, but things did not change.
It still doesn't sync my notebooks.
It only shows my single notebook item with a small sync symbol in the lower left corner of the icon.
When I try a "sync all" the spinning circle shows up for a few seconds but no sync is done.
If I click on the notebook the screen says "There aren't any sections here" and a sync (from the 3 dots in the upper right corner menu) does nothing.
My Lenovo Tab P10 with Android 11 and my old Android 7.1 phone do still sync my notebook without any problems.
What I did yesterday on my Android 12 phone was the installation of 2 shop apps (kaufland, netto) but this must not create any sync issues to a totally different app.