Well I was looking around on the web and mesh might not be the best solution. My problem is that I have a wifi 6 router from my isp in the end of my L shape home. I had a Strong mesh router Right beside that and another one at the other side of that L shape where my TV is. This worked fine but started dying lately and the network barely reached the middle part of the L shape home.

Can you help me with the best solution for this?

I have fiber internet, 1gbit from my isp. The isp provided router wasn’t used as a wifi network, only the 2 mesh nodes were used for wifi.