Vertical Line down front facing Camera

A thin green line appeared randomly during a face time call on my front camera about 1/4 of the way across the screen of my iPhone 10 Max. I brought my phone to the Genius Bar and they immediately ran diagnostics which it passed and then replaced the front camera. They ran more diagnostics, it passed again, but they still did not fix the problem. The green line is still here! I recently paid off my iPhone after 24 months, and my phone is 83 days out of warranty. The only solution they provided was to buy a new phone for $599. This is unacceptable. Can someone help?

I’ve already factory reset the phone,

upgraded the operating system, and replaced the front camera. Please do not tell me I have to go spend more money on a new iPhone.