Somebody stole my eSIM from my phone what do I do
Someone Took my SIM card out my iPhone what do I do now
iPhone SE, iOS 17
eSim is not a physical thing it's a number you get from your carrier
if you mean a real sim card then just call your carrier and have them cancel it, the only purpose of a sim card is to tie your phone subscription to the phone, so if stolen the carrier cancel it so it will serve no purpose for anyone