I received a notification that the IRS rejected my request and I resubmitted again. My application is pending for more than 48 hours. What should I do in this situation?

Do you mean you e-filed again after fixing the rejected return?   You will have to wait for the email that tells you whether the pending e-file has been accepted or rejected.

Yes, I e-filed again after fixing the rejected return. I’m worried I’ll be rejected again because my husband was accepted after just a few hours and he didn’t had any issues. I’m wondering why it takes so long..