I've got hundreds of GB's of what I call brain/mind audio. Some of it is definitely designed to help you fall asleep. Ironically, I woke up stupid early (1:30 am) and am just about to go back for more sleep! (I did get a lot of work done though!)
I'll see what I have that applies and upload some for people to try.
That said, I've been really enjoying several YouBoob channels that feature background music for work and concentration (they're mostly Classical). Here's two:
https://www.youtube.com/@classicaloasis
https://www.youtube.com/@enjoylifeandloveyourself
Oh, and for the Trance lovers out there, here are a few of my favorite channels there! 😁
https://www.youtube.com/@djmissmonique
https://www.youtube.com/@AuroraMuzic
https://www.youtube.com/@FlowStateMix
I tend to download everything so I can play them offline!