Once in a while this comes up but the more WiFi devices there are, you find there is some interference so there will be a small drop with almost every solution.
I'm going to bring up my favorite fix for the other end of the home and that's a POWERLINE KIT WITH WIFI.
Here's an example kit: https://www.amazon.com/NETGEAR-PowerLINE-1000-802-11ac-Gigabit/dp/B01929V7ZG
This would be my solution.
I have one netgear Wi-Fi 6 Rax120 router that distributed wireless and wired internet well through one part of my home.
I still have wifi deadspots in some distant parts of the home. I don't want to cut wireless or wired speeds with a new configuration. I see netgear will very soon release a wifi 6 network extender than can be connected wirelessly or wired... Or I can purchase a second identical router another netgear rax120.
Is one advantageous to the other? Only two devices are hardwired and currently wired to the first and my only router now. Is it better to buy another rax120 or netgears new wifi 6 extender? I don't want to lose bandwidth either wired or wireless