Loads on e bay....literally plug and play
See my WiFi 5 screenshot
I have BT 500mbps...on the BT router never managed more then 120 mbps over wifi. I invested in the EE wifi 6 router for £35 unopened.
Now regularly get 510mbps on wifi.
Do you need 900mbps though?
You'll find in the real world even 500mbps is overkill. Plus it's obviously a lot cheaper.