Push to talk for Samsung Xcover Pro

Yzlance We just bought this phone to test with Teams as well as there is ZERO information on how to configure the PTT specific feature with Teams walkie talkie feature.  The only option i can see is configuring the button to open Teams, but that's not what it's designed to do.

We're supposed to be able to click the PTT button this phone and it will work as a walkie talkie in the Teams app (even when locked).  The only way I can use the walkie talkie feature is to open the app, click on the walkie talkie then the channel I need then click on the screen to talk.  That's what every other phone can do.  What specifically on this Samsung XCover Pro with this very specific PTT feature for Microsoft Teams exclusively can do this?  No details anywhere.