Are "Favorites" and edits synced with Photos for Mac/iOS?
According to this Support article from 2016 the answer depends on how you sync:


If you import photos from an iOS device to Photos over USB, the favorite status will not sync (!)
If you use iCloud Photo Library to sync across devices the favorite status will sync. 


Source: Apple Support - Q: iOS Photos to OSX Photos favorites sync

FWIW this is totally offensive and horrible, I can hardly believe it. I just did an import of 3k images and apparently have lost all of my favorite statuses. What a mess.