Newbee question : Zigbee with conbee ii - multi level hardware installation

Configuration Zigbee
1

Hi
my home-assistant raspi is situated in the basement attaching the conbee to the usb port is possible but the range will be very limited …

Should I use “main powered” extenders to span the network through 3 levels (basement, groundfloor, …) or is there a better approach ?

Thanks
Hannes

2

Bulbs and plugs should do the trick

3

Sorry for the stupid questions
As I will replace my wifi accesspoints as well - will it work with combined wifi zigbee components as well like the tp-link deco ?

4

tp-link deco is a wifi mesh, it is not usefull for a zigbee mesh