What can I say, you're right, I plugged it into my desktop pc instead of my laptop and its working great.
So what could be the reason its not working on my phone? I have UAPP but when I play a song it just plays it on the speakers.
Sorry i ain't a computer expert, but what i can possibly think of is a usb issue on your laptop? Maybe try disabling uapp and see how it goes? Are you using MQA, i think that might not be compatible with sonata HD Pro.
Anyways glad to hear it is working.
I don't use uapp, perhaps u can ask the others in these 2 threads where the tempotec sonata HD pro is discussed:
https://www.head-fi.org/threads/hidizs-sonata-hd-dac-cable-new-tiny-and-mighty-dac-amp.880478/
https://www.head-fi.org/threads/usb-c-to-3-5mm-adapters-dac-lets-find-the-best.908839/