ZenWiFi ET9

u/crispysmoove I agree with u/TheImmortal_TK that ASUS would be a solid pick for you. BTW I have the slightly older ASUS XT8 mesh system and it works well in wireless backhaul, as it's tri-band WiFi 6 (2.4/5/5ghz bands). One of the 5ghz bands is dedicated to mesh traffic and the other 5ghz is just f

No worries. In that case I’d try a tri-band mesh system (like ASUS XT8, as I suggested). It has two 5ghz bands (one for clients, one for wireless mesh comms) so clients get full bandwidth on 2.4ghz and 5ghz. Since the rooms are right next to each other and there’s probably only one wall in the way,

If you can wire the mesh units together with ethernet, the ASUS ET9 mesh system (WiFi 6E) would work well and is only $99 for a two pack right now: https://www.asus.com/us/networking-iot-servers/whole-home-mesh-wifi-system/zenwifi-wifi-systems/asus-zenwifi-et9/ ASUS claims a coverage area of up to 5