Depends on what kind of community you are looking for, for me it's mostly IndieHackers and HN so I often click through profiles on HN comments or if there's a b

Depends on what kind of community you are looking for, for me it's mostly IndieHackers and HN so I often click through profiles on HN comments or if there's a blog post shared on a personal blog I look for their Twitter account there. After you built up a few interesting accounts finding more accounts via Twitter is easier and less noisy.