RealStormBringer228

Thi does appear to be the replacement display for the OnePlus 9, will you be replacing it Ur self?

you'll need a proper software implementation and you need to really accurately measure the distance between sensors. And even if you do that its still not very good since the l16 is frankly shit for $2000.

If you still have the headphone connector you might be able to reattach it. It will require a soildering iron and the skill set. I’ve seen YouTube videos of people putting new audio plugs on to headphones. I’ve never done it myself. Actually because all my headsets end up like yours, I ended up going Bluetooth on my last pair, and they have lasted a hell of a lot longer than any wired headset I’ve ever owned. 

You'd need to attach a new jack to the old headphone cable. Strip the cable, solder the wires to a new TRS connector, voila. There are also solderless 1/4 inch versions of the TRS connector, attach the wires to screw terminals then adapt the 1/4 inch connector to the 3.5mm you need.

If you can solder thats easily fixable.
If not maybe ask if any friends can solder.