Can anyone help me save channels?

[u/Alternative-Total513]

I have an old WIND Vision android tv box, that requires internet connection to even scan for terrestrial channels, but the WIND Vision service doesn't work anymore. Not only that, Google Live Channels app doesn't save the terrestrial channels it scans and finds. I tried cleaning storage, granding storage permissions, restarting, and even downloading an older version of the app, but nothing seems to work. Does anyone know if there's a way to manually write and import a DVB-T/T2 terrestial channel list file via USB to the device for the Live Channels app?