Troubleshooting wifi issues Suddenly the wifi of my Xiaomi A1 stopped to connect my home's wifi :-/

There is no update, either phone or router, I'm aware off. But  at some point yesterday I realized I was not connected. So I tried to manually connect. First weird thing, Android doesn't have the password saved. I enter again the password, and I just get "failed to connect".

All the other devices (iphone, ipad, macbook, google home, chromecast, etc.) keep working as normal.

I've rebooted the router just in case, but no outcomes.

Any idea how can I troubleshoot that?
As discovered in the comments thread, my issue looks to be a hardware issue on the phone itself.