Songs that play in Apple Music won't play in Library playlist

I'm trying to add some songs from one particular album on Apple Music to a playlist I have going in my Library. And for some reason, most (but not quite all) of the songs show up in the playlist I grayed out, and obviously won't play. And when I click on "show in Apple Music" from the dropdown menu for any of those grayed out songs, I get an error saying that the song isn't currently available in the US. Even though that same song plays in Apple Music, and it's the same song from the same album that got added to the playlist, where it won't play. This is the only time this has happened to me. Any idea what the deal is?

Joey Purp's "Quarterthing" is the album, and there's only one version of it.