There’s an app/service called Endel which makes music I find helpful for focus too. My family finds it eerily void and dead, like it’s technically music but lacks any soul. I don’t mind; I don’t listen to it for entertainment. It’s like the white noise.

I also like the white/brown/pink noise a lot. I think sometimes I crave a bit more texture and feature in the noise and so I’ll pull up endel, but I get by really well without it a lot of the time too.