@Sunshine thanks for the reply For 1) & 2) I can say done and yes IP Builds via DHCP (activated) and the Router is Set to Automatic Channel and I can Switch it to 36, 40, 44, 48 and there ist Channel...

I am unable to Connect to the TPLink_B8F2_5g Network via my Laptop (Lenovo Legion 7i), but I can Connect via Mobile Phone (OnePLus8Pro). This makes me having >100mbs Download Speed on mobile and only...