sync songs to my iphone

So I have synced songs to my iphone in big sur with no issues. upgraded to Monterey 12.1 a few weeks ago and today I added 4 more songs to the music app on my macbook pro all mp3 went to sync them on to my iphone using the music app. Lost most of the songs on my iphone and music app only synced a few songs back to my iphone. I got the error message "some songs wasn't synced because my phone can't play them". checked for an update on my MBP and udapted to Monterey 12.2.1 tried syncing the songs again and this time a few more synced over, but still got the same message "some songs wasn't synced because my phone can't play them". Yet these are all mp3's. Anyone got an idea what's happening or is this just another thing broken in Monterey?