What is your iSP speed wired? Getting a faster wifi setup than your connection to the internet is mostly useless. And what client devices do you have that can do WiFi6?
You could probably just get an access point like a TP link EAP670 ($134 on Amazon) they have wifi6. Set it up with the same SSiD as your network. I have one covering about 1400 sq feet of my upper floor most of the lower plus my garage and yard at 940Mbps on a 1Gbps iSP connection.