Having not dealt with warranty/service centers/anything-yet-because-my-leg-is-being-pulled-by-my-sales-adviser, I can tell you that it is a rather easy fix for most cars.
Now, I'll admit my knowledge is minimal regarding Tesla parts, but I recall my brother saying the clear lens was gently held on with some sealant (assuming silicone) when he broke his tail light and needed just a replacement cover (which is not available).
Use this information at your own risk, I am not responsible for any damages that may occur from attempting to separate your lights.
If that's the case, you could remove the tail light, gently bake it in an oven to loosen the adhesive.
I typically do 200-220 degrees Fahrenheit and check it every 10 minutes.
I remove all of the racks except for one and put it on the very bottom, and set the light on a piece of plywood (make sure it's clean, otherwise the wood can smoke) and place the tail light on there, making sure it's not touching any part of the stove.
After 10 minutes I remove it with gloves (I use just basic mechanics gloves, but you may need something thicker depending on your heat tolerance) and use nylon spreaders ($5 at harbor freight, they're yellow) and see if the light will separate. If it does, continue until the glue cools down and re-bake as necessary.
After you have it apart, you can either add more silicone, if that's what there, or use a butyl glue, which is what I typically do.
I use some from Morimoto, as they're my go-to for anything light-project wise.
Morimoto RetroRubber Butyl Glue - Custom Headlight Build Materials From Morimoto
