Mostly via online record stores
Discogs (Genre) Sort by "Hot"
https://www.discogs.com/search/?sort=hot%2Cdesc&style_exact=...
https://www.phonicarecords.com
https://www.junodownload.com/leftfield/
https://hardwax.com Great weekly recap mixes featuring their latest releases on Youtube https://www.youtube.com/c/hardwax_official/videos
Bandcamp search by tag/genre. Discover tracks I like, then click through to see what other tracks supporters have recently purchased - honestly found some of the best music via this method.
I also run a monthly mix series called Dystopian Disco - that's predominately focused on unearthing new house/techno/dark disco releases.