I don't know if this place is the right one for my question but I'm gonna give it a try.
I use the MacOs Music app (manually organized) and the MP3Tag App.
With the MP3Tag App i consolidate the tags, number them and add Covers.
After doing so I can refresh the tags in the music app by deactivating and reactivating the edited tracks in the Music App.
Thats a no-brainer. But I couldn't find out a way how i could see the added artwork.
Even worse - when I use a intelligent playlist which only shows me tracks without artwork i see artwork. When I check files, which I edited previously with MP3Tag, the finder shows my the embedded artwork.
I guess thats not really a problem of the MP3Tag App, but maybe someone had the same experience before and could give me a hint?
Mp3Tag Version 1.2.3 (51)