I factory reset my Xbox one but my Wi-Fi connection wasn’t showing up and it asked for a...

Did the bridge mode thing. It messed up my router for some unknown reason, so I had to reset to factory settings. My Wi-Fi works again, but my 360 still won't connect to Xbox LIVE.

So that's cool.

At the back of your router there's a tiny hole you can press using a ball pen for 5 sec to factory reset it. Please note that after a factory reset, you will have to connect to your network using the default Wi-Fi SSID or name and Wi-Fi password indicated at the back of your router or manual.

Yes, Wi-Fi has to deal with software but it's a hardware just like bluetooth. A device won't be able to support Wi-Fi if there's no hardware for Wi-Fi or wireless connectivity or let's simply put it as a wireless card.

Hm, if you can't connect with cable we can't remove Xbox wi fi as a problem from the list.

Please try
factory reset

with option keep my games and apps.

I tried everything as you suggested, but the issue persists. The Xbox One will connect to my mobile hotspot, but not to my Wi-Fi suddenly. My phone, Fire Stick, Xbox 360, and Switch can connect just fine to Wi-Fi.

Just a few questions dear friend. Are you part of an insider program? Have you tried a factory reset with option keep my games and apps? It is described here.
Is it only with wifi or also with cable connection? Have you tried to set up wi fi on xbox again? Your download speed on your other devices?