I want to create a network at home.

I have 3 buildings:
- main building (3 floors)
- wooden building
- outbuilding

1. main building (3 floors)
main EB800 router - floor 3
signal amplifier (wifi) in easy-mesh - 2nd floor
signal amplifier (wifi) in easy-mesh - floor 1

2. wooden building
I plan to have a LAN and WiFi network (cameras, computers, etc.)
I want to mount AX10 there, which will connect directly to EB800 and use EasyMesh Network via Ethernet Backhaul

3. farm building
I plan to have a LAN and WiFi network (cameras, computers, etc.)
I want to mount AX10 there, which will connect directly to EB800 and use EasyMesh Network via Ethernet Backhaul

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Do I understand correctly the advantage of Ethernet backhaul & EasyMesh?
- the AX10 router in this configuration will be a device that will expand the LAN and Wifi network?