Was the injector replaced? If not, do you still have the misfire? If you do, I wouldn't drive it because it could lead to damaging the catalytic converter.
As far as the lower compression, if the injector was stuck open so that it was dumping fuel all the time, that could have been the cause of the lower compression. Once the motor oil is washed off the cylinder walls, the rings can't do their job properly.
Actually, when I have a cylinder with low compression, I check it both dry and wet. Dry means I check it as it sits. A wet test is done by adding a small amount of motor oil right into the affected cylinder. If the pressure goes up, then it's a ring issue. However, your issues sound related to the injector as I mentioned.
If it still has a misfire, I wouldn't recommend driving it until that is fixed. The engine is under powertrain warranty (10 year/100,000 miles), so even if it is mechanical, it will be fixed. If it is the injector, I believe there is a 5 year/60,000 basic manufacturer warranty that covers nearly everything except maintenance items. A faulty fuel injector should fall under that warranty.
Let me know if I can help or if you have other questions.
Saturday, March 27th, 2021 AT 10:47 PM