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Let us count the "waves"...
(lemmy.world)
Nightride.FM has datawave (sort of 80s/early 90s computer-aesthetic synthwave) and horrorwave (darkwave subgenre, very 80s horror movie inspired) stations.
My favorite sub-genre is probably Cyberwave, but of the niche genres I've come across, I've gotta give props to Simpsonwave (which even has its own Know Your Meme page)
I love Mallsoft (https://en.wikipedia.org/wiki/Mallsoft) which is a subgenre of Vaporwave.
Sovietwave is one of the weirder ones I've come across, but it works
All things "wave" music: synthwave chillwave vaporwave retrowave cyberwave darkwave dreamwave...