My wife manages many playlists for her fitness classes and used to be able to edit them on her iPhone and have those changes sync to her MacBook. However, now it seems that the MacBook is overwriting any edits made on the iPhone. I'm uncertain if the MacBook copy has always been the main version or if she was imagining the syncing worked differently. Is there a way for her to reliably sync playlist updates from her iPhone to her MacBook? Just to note, she gets MP3s from her company and doesn't use an Apple Music subscription.
2 Answers
One option could be to utilize the Music app’s sync features if you had an Apple Music or iTunes Match subscription. That way, any playlist, play count, and so on would sync across devices wirelessly. But since that's not available here, it won’t help.
For her situation, it's actually typical that syncing works better from MacBook to iPhone rather than the other way around. She should import those corporate MP3s into the Music app on her MacBook first, and then sync them to her iPhone. Focus on syncing selected music rather than the whole library to keep things manageable.

Exactly, and since she doesn't have a subscription, that's out of the question. She'll need another way to deal with it.