https://www.lifewire.com/mp3-players-you-can-use-with-itunes-2000486 writes:

"Current iTunes-Compatible MP3 Players

As of this writing, there are no MP3 players made by any company other than Apple that work with iTunes out of the box. There is software that can make other MP3 players iTunes-compatible (more on that later in the article), but none with native support."

So this means you have to be willing to work around this. The article dives into solutions.