As it happens I have a very similar machine: XPS 9530.
Audio settings appear identical to yours - and my audio works fine. Frustrating...
I'm not sure what to suggest but it might be worth toggling this on/off:
Preferences > Previews > Mute audio when playback is not real time
Thanks for your suggestion, it didn't help unfortunately.
Can I check: In your Audio Output Mapping is the first box 'Map Output For:' grayed out?
Yes - exactly as your dialog.
I've also just powered up Premier to check my settings - same set up as you, the only thing I notice is that my default output is:
"Speakers / Headphones (Realtek High Definition Audio)"
as opposed to your:
"Speakers / Headphones (2 - Realtek Audio)"
But I don't think that's of significance.
Sorry I haven't got a solution...
Just on an off chance have you tried plugging headphones in in case it's some output mapping oddity...
you could always try trashing your AE prefs...
Ctrl + Alt + Shift immediately on AE startup
I just shared my screen with an adobe agent and they found it
The system's volume mixer had muted it for some weird reason, probably to do with ASIO at a guess.
Anyway, if you're a mac user who's switched it might not be obvious to you either so right click on the speaker icon at the bottom left of the Start Bar and choose 'Open Volume Mixer'
Thanks for trying to work it out!