Pixel 8 stopped looking for WiFi networks. Other devices work fine on my home wifi. Tried rebooting both phone (several times) and router. Each time I go back to Internet settings, “Use Wi-Fi” is off. When I turn it on, networks don’t appear. When I leave Internet Settings and go back, “Use Wi-Fi” is off again. 5G Mobile service works fine, but mobile service is lousy in my neighborhood.
Speculation is that your dns connectivity check is failing, and then the system thinks you don’t have internet so possibly disables the connection? Can you check on that and report what dns servers are set for your home network devices? (In my case before, cloudflare 1.1.1.1 was causing this issue, but after changing to quad9 9.9.9.9. the check works again and there are no issues)
At one point I decided to put the phone into a safe mode that disables all apps. The next morning I found that it could find the networks again. Not sure what to think about that.