Bummer! I feel your pain having done something similar to my baby on my third trip out with it. As for repair costs, it all depends on how much R&I there is (Removal and re-Installation) and, as others have said, whether there are any aluminum parts involved and whether any sensors or cameras have to be removed/reinstalled.
I clipped a parking sign with my Model 3 and that turned out to be a $6,200 repair job (initial appraisal was almost $7,000). The front left fender is apparently aluminum (not mild steel like the rear fender), so they had to replace it rather than pull the dent and repair it in place. And replacing the fender required removing the front bumper, side view mirror, various trim parts, moldings, etc. as well as deactivation of the high voltage system. And to match the color on the surrounding parts required blending the paint with a 3 step prime and paint process for most of the left side of the car.
I wrote it up here:
Here's What $7,000 Of Damage Looks Like On A Tesla Model 3 | CleanTechnica
Hopefully your repair will be much simpler (and cheaper) than mine was. BTW, my repair took almost 3 weeks, but much of that was the insurance company arguing with the auto repair shop and sending their own independent appraiser to confirm the details.