So, this is basically my question. Not long ago I bought Wi-Fi 7 router Cudy WR3600H. It can run 2.4GHz and 5Ghz (no idea if hardware can 6GHz, but probably not at least until it will be allowed in my country).
 

As adapter I bought TP-LINK TBE400E. It's also Wi-Fi 7, supports MLO.
 

To confirm at least something, I used moblie app WiFiman that highlighted, that my network indeed is Wi-Fi 7 and using MLO. The issue is that for some reason my Windows still uses protocol 802.11ax (Wi-Fi 6) instead of 802.11be (Wi-Fi 7) when I connect to my network. I updated windows from 22h2 to 25h2. I installed the latest driver. I set network to use WPA3-Personal. But windows still for some reason uses Wi-Fi 6 protocol. I'm out of ideas why. I want to use MLO. Why can't I?
 

Just to clarify, netsh wlan show drivers shows that it supports 802.11be

P.S. Just now I noticed that there are different driver versions for different regions, but I have no clue right now which one I need. At the very least I see no warnings in the Device Manager.