After you file

Hello I have a personal interest in your situation as I am also in the same group as you.  My return was accepted and I've received my refund from one W2 I submitted, well I received 7 more W2s in the mail that I somehow forgot about, a week here a couple days there, (it won't be much money) when I was job hunting during initial virus outbreak I unfortunately went from job to job.  I also received the 3/25/21 availability date for access to the 1040X form. Is this an IRS date across the board? Regardless have to wait now I guess and hope I can get those W2s added as they should have been to start with.... my mistake tho.