Ocultar Identificador de la red (SSID)

I know the video is about turning the radios off but there are other settings in the configuration file that can be changed and saved. Not sure if the broadcast option is there or not.

The YouTube video that Nater Tater has done probably has the answer. I cannot recall if the broadcast setting was in the configuration output or not. He made the video in response to the lack of options with the Arcadyan software. Users wanted to turn the wifi off to use their own router solution with the gateway. He does provide the commands to use and the steps to take. It is pretty much copy and paste with a few edits for router specific information. It is not hard it just takes care to get it right.  

You can check the mobile application to see but I do not know that there is an option in the mobile app. The mobile application can be a bit flakey so best of luck with that. 

https://www.youtube.com/hashtag/tmobilehomeinternet

HACKED - Hidden Settings - Arcadyan KVD21 T-Mobile 5G Home Internet - Turn Off Wifi

You might find the Arcadyan user guide helpful to have. Attached if you want it.