>- Another option to get through areas that block Wi-Fi is a powerline ethernet adapter kit such as https://www.amazon.com/TP-Link-Powerline-Extender-TL-WPA8631P-KIT/dp/B08RHZBHTM/ref=sr_1_8 . This creates a link to a new AP upstairs through your electrical cabling, which can be faster than Wi-Fi to the same spot

I have the TP Link AC 1200 (2 with switch and 3 LAN ports, 2 without switch).
It works well even in Gorgon or Hydra electrical wiring setups (tested in travel abroad)
I used it to guarantee LAN to every floor and for that it works great.
Speed became a problem during Covid19 times of online study and conferences -
expect only 20 - 40% of speed promised when traffic is heavy and multiuser.

I switched over to LAN cable connecting 2 main floors with most usage
and use Powerline only for extreme cases under roof, in cellar or outside.
The convenience of just plugging into any electric socket is wonderful,
but for everyday usage a true LAN wire connecting fixed
switch/router/WLANrouter/extender is miles ahead of Powerline.
(@Dmitry: You live by the stuff, get both if there is need in your house)

I separate my "business setup" from normal usage via a router cascade.
That way I can give finer grained access to family (they can get infected as well),
visitors and smart home stuff (both get their own guest networks).

Same can be done with multiple WLAN routers. Side benefit:
I have subnets with PiHole removing lots of advertising,
but can change to other WLAN on device when access is denied without advertising.

coming from paranoid Neanderthal cable guy - but works great