I cancelled my $800 manual cover (as well as loss of the $3500 powered one) in favor of a rollup, that I don't have to clear the gear tunnel to store. So YES, I'm looking for the right one.
Take a look at Munro Live, Sandy did a comparison of the wiring harness of a Tesla vs Rivian (or other EV) and the difference is striking.
I just hope it doesn't take as long to get the adaptor as it did to get the truck! We're liable to be buying 3rd party adaptors sooner!