I have an older home with wifi and many dead zones.  I would like to extend wifi coverage using powerline adapaters.  I do not want a repeater, they do not work, there is not enough signal from the router to the repeater to work well.   I would like to be able to create two networks, wifi 2.4 for the home assistant and other IOT managed devices, and separate wifi 5g for mobile devices.    I would like the powerline wifi adapter to have the plug option.      I am not clear on what the product is to buy for a second and third adapter with plug

https://www.amazon.ca/TP-Link-Powerline-Extender-TL-WPA7517-KIT

I start with this kit, one adapter is plugged into the router, and I can place another in another area of the house on the same power line.   

What is the product I need to add 2 more powerline wifi adapters.  

Is there a wifi powerline adapter with a passthrough plug?   Can I use an ethernet powerline adapters in the same network/setup, are they compatible.

Can I use an ethernet powerline adapter with a passthrough plug and add on a wifi device?  

thank you.