Apple devices no longer connect to Wi-Fi everywhere?

Hello,

I have an iPhone 13, iPad and it no longer connects to the WiFi.
My sister's iPhone too.

But for example my switch works perfectly, I reset the network settings and restarted the router/phone but nothing works.

It shows that it is there and at full strength but it does not connect.
The wheel rotates continuously. They work near the router, but not in other rooms, even though there have never been any problems.

what could that be?

PS: I mean the wheel to the left of the WLAN name