iOS 26 update causing issues with audiobooks, playlists, and Apple Watch sync on iPhone

Hi! is anyone experiencing incursions after updating to iOS 26? Asking because I am not sure if it's the fact that I got a new phone or the iOS update that's changing things around my phone?

• I can't play audiobooks I've purchased.
• My playlists are all over the place.
• My watch and iPhone aren't fully synced.

I'll check and adjust some more of the settings and wait it out a little bit.

So far I don't see any options or buttons I can click that "might" fix the issue.

I've signed out then signed back in on most apps, as well as restarted my phone.

Thanks.

[Edited by Moderator]

Original Title: PHONE IN SHAMBLES