My guess is you’ve got the PTT configuration incorrect. Some of the apps I checked had it defaulted to VOX mode, once I changed to CAT it worked fine (you could also configure your radio to accept VOX too if that’s an option)

it sounds like otherwise everything’s working. I bet it’s that or something related.

EDIT: do you just have audio? Or do you have a rig control serial/usb cable connected? If you only have audio you’ll have to see if VOX is an option