I'm looking at purchasing the TP-Link RE605X for my new laptop that supports WiFi6, I have an existing TP-Link access point/extender and the performance is terrible so I'm wanting to know what LAN speeds I should expect under "normal best case" i.e. real world conditions for file transfer using the TP-Link RE605X.

I'm aware of limitations of wireless such as general interference walls, walls with cables in them etc, loading and congestion but if I set this up as an extender, plug in the Ethernet from the LAN to the device and I'm only 5 meters away (and the only device on this Wi-Fi network) what should I expect in MB's.

I get around 100-110MBs on my wired LAN