I keep getting literally every game I've ever submitted in the submission box, but not the music I just uploaded. It's nowhere to be seen. Do I need to have a particular setting on it or something like that?

It's public, it should be visible, and it is open to view and download. There's an MP3. The only difference with the other soundtrack I've got uploaded is a lack of cover art, but that doesn't make a lot of sense. I've got it here: https://vikinghelmet99.itch.io/silurian-world-view

But, it doesn't want to show me this option when I try to submit. Just the long list of others.

I will check out if i can see something wrong, other submissions worked so far. But dont worry, if it dosnt get submitted here (in the jam) for some reason, just post it in community (like you did) and I will check it out and try to get the submission on the info page for the jam so people can check your music out.