Usb-C to 3.5Mm Headphone Adapter Not Working

My 2nd pair of headphones behave the exact same way. Both pairs of headphones work when plugged in to a phone or tablet that has an old-school headphones jack.

The device was purchased at Best Buy. I knew buying from (say) Amazon would be a crapshoot. I didn't realize the forum would convert my URL to an affiliatelink, sorry.

Thanks for the confirmation that this should work. Given that the music still plays from the phone speaker when I plug it in, I suspect the phone isn't detecting it, and it's probably defective. I'll try returning it.