Hi MakremAyari
I have the same Intel Wi-Fi 6 AX200 160MHz on my SP7 (Surface Pro 7) with this problem, Windows's update had a firmware update so I am hoping it is fixed, my router is also had 2.4 and 5GHz and only my SP7 has the problem. My other computers and phone work fine with the router.
I would check to see if there is a bios/firmware update for your computer.
The last few Insider's installs have this problem unfortunately
To get the wireless working again I use the following.
(1st) Settings, Network & internet, advanced network settings, and then use Network reset.
(2nd) You can also go to the device manager and un-install the AX200 network drivers, reboot, Windows will re-install the drivers.
If the first doesn't work then I try the 2nd method. Once you have it working download the latest AS200 drivers from Intel and save them to the desktop in case of further problems going forward so you can re-install them if necessary. I think Windows Update interferes with the drivers so causing the problem.