.ml is unavoidable for some niche tech communities unless you make your own with blackjack and hookers, but for example, Linux has !linux@lemmy.world, !Linux@programming.dev, !linux@sh.itjust.works, and !Linux@sopuli.xyz. Privacy has a lot less competition in the form of !Privacy Guides@lemmy.one, !Privacy@lemmy.world, !privacy@lemmy.ca, and @Privacy@programming.dev.