Only way I know to do it on an Inrico T320 is to use an external AMBEServer. I don't think the T320 is an OTG device. But I stopped trying to use a ThumbDV connected directly to a phone when I saw my battery charge indicator visibly sinking while it was connected. It draws a LOT of juice, even when just in receive. So I have a Raspberry Pi on my local network, with a powered hub on it and the ThumbDV plugged into the powered hub. That same horrible power draw means a Pi USB port will NOT power the ThumbDV directly. You MUST use a powered hub. (For Pi 3+ and below. I haven't tried it on a 4 with USB-C.)
My Pi has:
AMBEServer installed (NO BUSTER)
A dynamic DNS daemon, so if my local network IP changes, it can update my dynamic DNS address.
A port-forwarded hole in my firewall so I can get at it from outside.
Then configure BlueDV AMBE for the dynamic DNS address instead of the localhost IP address.
Works fine, but I only use it when I want to use my T320 as a backup device. I take it to things like Field Day, or hamfests. The PTT works great for things like Echolink, Teamspeak 3, and Zello, but I don't use Zello because it doesn't play well with others. If you have Zello configured for PTT, even if you stop the app from the apps menu, if you hit the PTT, it'll RESTART Zello, even if you're trying to use the PTT with Teamspeak or Echolink. Freaking annoying, so I stopped using Zello.