Help avoiding these tracks from disappearing

Hello everyone, I am not really sure which flair/tag this post should have, please let me know if I should modify it. I just don't want these tracks to disappear into nothing ☹️

There is a certain very small artist I have been following since 2018 called Mosh, but the person went inactive a couple of years ago and stopped making music (at least under that name).
I kept listening to their songs since I really liked their music, but recently I found that their songs are greyed out in Spotify and Apple Music, and the Youtube videos of the tracks also disappeared.

There were never download links, and I didn't think that this would ever happen, but I am afraid that these tracks might get lost forever.

I tried contacting the artist through Instagram but never got any response.

This is their Spotify profile (I was one of those 5 monthly listeners 🥲 ), and this is their Instagram profile (the youtube link in the profile leads now to the Youtube Topic channel, but that is not the artist, it is another artist with the same name).

Is there anything I can do to prevent these songs from completely dissappearing? Buying licenses or something.

Thank you very much for reading all of this, I have kept these songs in my head for days and I want to keep listening to them 😊