That is correct, Zorin OS 17 is based on Ubuntu 22.04 and uses the GNOME desktop environment at version 43. Native integration with OneDrive is only available starting at version 46, which for Zorin OS means waiting until the next major release.
There's no fixed scheduled date for when this will be released but the Zorin OS developers have stated that should happen throughout the following months.
For the time being, I'd suggest you look into one of the options mentioned by @Forpli. If you need some guidance, here's a guide on how to do that — the exact version might vary as this was written for the previous version of Zorin OS 16 but the overall steps are the same:
Yes, it is. But as you pointed out there seems to be a few bugs that were recently introduced as part of a recent upgrade. I'd suggest you open a new thread to discuss this issue separately for the time being.