iPhone 15 Promax suddenly said No Sim and Invalid Sim after I updated iOS 18.1

I have been using two different eSIMs on my 15 Promax with no problems.

I updated iOS 18.1 last night. I used my phone and internet last night and this morning with no problem. But both Signals suddenly disappeared, and it said "No SIM for Verizon" and "Invalid SIM for local Airtel." I have tried many times to reset the network settings and restart and everything I learned from YouTube and group’s recommendations and it didn’t work. So, is it also related to the iOS update? What should I do? Please help me.