I think what's really happening here is that most people, especially older men, are realizing how much of their social life is tied to work and going to the office. My advice is to get some hobbies, make some friends, join some groups. Even if you aren't willing to go out, finding groups and chatting online in a voice or video call is probably better than just sitting in your home alone.
That said, I'm actually dreading return-to-work to a certain extent, because it's optional at my company right now, so I've been able to make my office into a nice little interruption-free cocoon. I spent the summer outside with a laptop and 5G hotspot, but the weather right now isn't really conducive to that.