In truth, I use a USB-C/Lightning-to-3.5mm adapter. It lives on the car's aux cord.
I've considered wrapping the thing in heat-shrink tubing to give it some rigidity and protect the nano-scale-wires they're using in there, but haven't got any handy.
I'd love a phone with a real jack, but phones just aren't made for me anymore.
Isn't that just Best Buy's store brand?