So when is this being done as why should there be a need to ask for the allowance on usb dongles on a tablet when its allowed on a PC....think you need to speak to your product owners regarding poor application function planning.

Zwift it is

I have the same issue, tried both on android phone and android tablet. Only able to connect via bluetooth but not via Garmin ANT+ stick

The Garmin ANT+ stick works with Zwift (both on the phone and android tablet) and my windows laptop

So there must be a bug with the app

totally frustrating app. will not connect to my devices . reboot everything.
flush cache,
reload app
try different computer .
launch Rouvy everything is Groovy
when virtual does allow me to ride it stops recognizing devices and I slow roll to the curb. sometimes it wakes up, but ***** the bed a couple of miles later everything everyone else rolls by happy days