Yes, you can, but you should definitely not buy the E4 set, because it can only do 100Mbit/s Ethernet (you would only get 100Mbit Internet into the home network with it, today 1Gbit and more are almost standard) and is technically outdated.

My recommendation is a Xiaomi AX3000 Mesh WiFi 6 system that can do 1Gbit on the LAN. It can be expanded to up to 10 devices, but also has excellent coverage with two routers. In addition, it can support more devices thanks to the 5 core processor and the latest WPA3 and is also more secure. Each router in the set has a 3 x Gbit switch built in. It costs a little more, but is superior in every way to an E4 mesh router. It supports up to 256 devices:

Xiaomi Mesh System AX3000 (2-Pack)

You must connect to a separate router