I took my 2020 in back in June. I actually used to work at the dealer that I took it to as a service writer as well, so I still am in good standing with the service director as well. They diag'ed and said cracked passenger manifold. Part has been on order since then with no ETA. I finally broke down an bought JBA shorty headers and am having a friends shop do the install for me this coming monday.
A friend of mine also knows a service manager in another state that just let him know that the manifolds will be a recall now as well, due to possible C02 entering the cabin. Early stages of that process so i would think IF it does indeed spark a recall, everyone would see that in the coming months.
Either way, i am putting shorty headers on, and I hope that stellantis will at least comp the cost of install for me. Ideally If they do recall it, I will try to push them to cover the cost of the headers and labor as well, because there is no availability and it technically could be considered a safety issue.