Do downloads from the itunes store in 2022 only work within the app, or can you download an mp3 to put onto other devices?

I know that obviously iTunes used to let you download mp3s, but I’d like to know if it currently does. I like listening to music on my phone through an mp3 player app, and I usually buy music from Bandcamp, but some artists don’t have one and I’m trying to figure out what a good place to buy songs besides that would be. (I have no interest in paying for a streaming service, since that doesn’t support the artist very much.) Apple’s page on the subject says that you can download songs for offline listening, but it isn’t clear whether or not that’s just within iTunes/Apple Music or if it’s an mp3 you can keep.