I’ve had Apple delete my music from my devices.

As in, I had a physical CD I had purchased, ripped to MP3, and loaded onto my iPhone.

iTunes recognised it, linked it to the matching official entry in their music store, they lost the licence and deleted all customer copies including mine.

Lest we forget that they forced the U2 album onto devices, then after backlash removed it.

But apparently it still syncs itself on some devices to this day

Yes. I’ve got so many greyed out songs in my library due to this :(

That's every provider