Apple Music playlists on other devices

I have a Tonal machine and it can access Apple Music during workouts. I created a playlist for my workouts and there are a few songs that are grayed out. When you click on them it says “Tonal can only play tracks that are a part of the Apple Music catalog. If you have uploaded your own music, you cannot play it on Tonal.”

A lot of the songs are ones that I have downloaded or purchased prior to Apple Music. So my question is how do I add them to my playlist?! I’ve gone to search in the Apple Music library only, but it still doesn’t fix the issue since I bought the album?!!