Sync ripped Podcast files to iOS devices now iTunes won’t do it

I have many files ripped from CDs or on MP3s that I used to sync effortlessly from iTunes to iPhone and iPods that I still use. Apple seems to have destroyed that workflow, so what do I do now? I rarely subscribe online so I don’t want to go down that path. So how do I manually upload/sync these files from my mac and what’s the best iOS app to use for this. I’ve no idea if the new iOS podcast app will sync these sorts of files.