Wi-Fi connection no longer works?

The problem is this for about 2 weeks now the Wi-Fi in my room has stopped working. The network is either not even displayed or a connection is not possible. Sometimes it goes for 10 minutes and sometimes it doesn't. The problem affects laptops and cell phones. In the living room (right next to my room) it usually works. WLAN and unplugging brings nothing

Any change near the router? For example, Anything metallic or other changes?

No