How do I increase it by the router? I don’t drink beer lol.
Look for power setting or signal strength settings. On mine the default was 5 of 10. I left it there as that is enough.
I had a Linksys router that would let me do that.
You might also be able to select the channel the router transmits on. If you have a lot of wireless devices around you transmitting you might want to set it to a specific channel.
Your router manufacturer probably has a web page for all this info. What kind of router do you have.