Hello,
we are the same situation as you have now. The card expired two years ago, and the I797 letter expired on 9/14/2022. I called USCIS couple weeks ago. They said they scheduled us last December 2021 for interview on April 2022. But then they canceled the interview without noticed. We didn’t even get letters about scheduling and cancellation at all. We were waiting for the whole time. The lady that I was talking to, she thinks because it was Covid and USCIS at our location was limited closed or whatever, so they don’t have enough people to process. She put a notice on our document and hope to reschedule soon. She said the only thing we can do is just WAITING!!!!
I also asked her about the info pass, she said in our situation, for conditional green card removal, there are not a option to get the info pass stamp. She said we could apply for the reentry US form, which we need to pay for another $600 or so, file another stupid form, and wait for god know how long we need to wait for the slow government make the process.
it is such a very lack of communication and falling apart of process. We are now not about to travel out of country or if we travel, we will have trouble to come back.
Anyway, I hope you and us will hear things back soon.