No, if you printed, signed, and mailed in your 2021 and 2022 tax returns, you can't e-file them afterward.
You say the IRS says they are pending, does that mean you have checked using Where's my Refund? and it says pending?
If so, they have received your returns and are processing them. You should know it can take up to 16 weeks to get a refund from a paper-filed return, but it's usually 6 to 8 weeks.
If it's been longer, you may want to contact the Taxpayer Advocate to check into the delay. Follow this link to get started.