I suppose you did not use a mailing method where you could either track the returns or get proof of delivery.
when you e-filed 2020 federal 1040 what did you use as the prior-year AGI? if you used what was on the 2019 return then the IRS got that return. A transcript will not show up until weeks after the 2019 return is fully processed. otherwise, the return would have been rejected for a mismatch in the AGI. if you used $0 or not submitted then note the IRS is behind in processing 2019 returns but there is no way to know if yours got lost in the mail or simply hasn't been processed. so choose between waiting and resubmitting.
as for your resident state call first to find out what happened. this is so if they require an amended return everything required is included. when you mailed in your resident state return a copy of the tax form to compute the credit for double-taxed income and copies of the non-resident state returns were required.
(on an e-filed return this is done automatically)
