I don't know how to answer your title question, but if it helps, I heard you and can relate to the isolation described in the rest of your post. Most of the online communities I was a part of have been disrupted one way or another. The ones I haven't disconnected from (like HN) just make me angry more often than not these days. IRL... I have nothing but remote work colleagues and family members who live far away. I do have access to a therapist thankfully (remote as well) -- some weeks the hour I talk with him over Zoom is the most I get to use my actual voice...
Yeah, I don't have any tips, but can relate. Life's gotten really fucking weird and lonely, but you're not alone in this weirdness.