I'd rather have a few missing accessories and have that get resolved, than a chip in the drivers door and a dent on the rear fender (happened to me)
I'm sure Rivian won't give you any problems getting your gear guard cable. They've been great with me so far, but getting service scheduled takes forever.
I was pleasantly surprised that the frunk cargo netting was included because I saw it sold in the gear shop. Now I have 2, since I bought one prior to taking delivery. Oh well.