WiFi6 : Brain and remote cannot see the network

Hi, last week I updated my old WiFi network to a new one with WiFi6.

I replaced the Access Point with a Netgear WAX218 (Aka AX3600).

All my devices (laptop, phones, ...) are working as expected but the Neeo stuff do not see the WiFi Network.

I tried the following things : 

 * Set the WiFi to 2.4GHz only

 * Force the SSID on the brain (like if it was an hidden one)

But nothing is working.

The firmware is up to date (checked yesterday (19th March 2021) using a wired connection.

Have you an idea ? What should I do to make the Neeo Brain connect to this WiFi Network ? (Wired connection is not an option)

Thank you for every thig.