Rivian never said they would match the number of chargers Tesla has. However, Tesla will be opening their charging stations to nonTeslas later this year or next year.
NEMA as well. I can fully recharge overnight since I pretty much use the Rivian for my daily driver locally. Supposedly, slower charging will lengthen battery life from what I've researched on the internet.
Unfortunately, it appears as if you're stuck. I think this thread needs to be closed unless anyone else can come up with any ideas to get DisneyDad's order reinstated.