does erasing iphone lead to esim deletion

When you erase your iPhone, you will be asked if you want to either keep the eSIM or also erase it.

Erase --> Erase iPhone - Apple Support (IN)

1. Keep eSIM Data was the option you should choose
2. Prepare your device for service --> Prepare your iPhone or iPad for service - Apple Support (IN)
   1. Back up your iPhone or iPad: Back up with iCloud. Back up with your Mac. Back up with your PC.
   2. Turn off Apple Cash and remove your cards and passes from Apple Wallet.
   3. Turn off Find My: Go to Settings > your name > Find My, then tap "Find My [Device]" and turn it off*.
3. If needed, suspend your mobile service:
   1. 1. If your device uses a physical SIM, remove it.
4. If your device uses an eSIM, contact your wireless provider to get a new eSIM or suspend service if needed.