If you look at the photo not only is the charge port door damaged but also the front bumper has damage to it.
It's also the labor to remove the bumper and charge port door. Repair the bumper and charge port door. Then paint everything and do the reassembly. Oh, then you get to take it for the...
That estimate has to include repairing and repainting the front bumper also. There is no way the charge port door would be $4400. I work at a certified collision center.
I would not use silicone sealant. Just going to goo up the door and make the part harder to remove. This is a known problem with Rivian. You could always just buy the part and have it installed and submit the invoice to Rivian for reimbursement. The door is made to have some water intrusion and...
Rivian has the same kind of "parts department" as Tesla. The body shop orders the parts directly from the factory. And Tesla is no faster then Rivian, Rivian is actually faster in delivering the parts to the bodyshop. I order them everyday. The service centers do stock some parts but they are...
You should be able to buy the part from the local Rivian Service Center. Part cost over $500 because of the camera in it. Flares on R1T and R1S should be the same.
To replace the front door the bodyshop will have to blend the paint into the fender. To blend the paint into the fender, the front bumper, headlamp, etc will have to be removed.