I am trying to understand how to get the 4×4 MU-MIMO on the 5 ghz wifi for this device. When I check the signal, it clearly shows up as 2x2 while the 6ghz wifi is showing 4x4. How do I get the full 4324 Mbps on 5ghz when it's capped off at 2882 due to 2x2?

This is what Wifiman is showing for the 5ghz network:

Security: WPA2-PSK / WPA3-SAE / WPS

Channel: CH 40 5170-5330 Mhz

Channel Width: 160 MHz

PHY Mode: Wifi 7 - 802.11be, MIMO 2x2

PHY Speed Capability: 2882 Mbps

Did I set something up wrong or did I misunderstand the specs on the TP-Link site?

https://www.tp-link.com/us/deco-mesh-wifi/product-family/deco-be75/#specifications

Any advice would be appreciated. I am still within my return window and so far am I not impressed with having such an old firmware and speeds lower than advertised. 

Edit: fixed a typo in the title