Last we heard, it might not be making a comeback. Perhaps in the future they will fix up some of the design issues regarding it and try again.
https://insideevs.com/news/618089/rivian-stops-making-r1t-powered-tonneau-cover-to-redesign-it/
It's stunning! Congrats, you're about to have so many great memories with your rivian. The light issue sounds frustrating, i don't have a rivian (yet) but my other vehicle has a similar issue and i eventually just had to make peace with it, but i still love it.
Dropped my house key down by the drivers seat once and something magnetic underneath pulled it further in and after considering breaking into my own home, and nearly an hour of looking, i finally found in the most random place, still stuck to the magnetic portion. Crazy day.