I had a similar situation. However I made a total of about $320 Dell purchase on 12/31 across two BP cards, but only $50 posted on one card and about $64 on the other. Both of those got credited in 2022, but I have no clue what happened to the rest.
interesting how your experience is different then that of
@jew above.
if its 2022 credit then i will not be happy.
tried chatting with amex what happened with rest of your credit?