The eSIM activation code is provided by the carrier service. After you use the activation code to download your profile to the device successfully, the code is considered consumed and cannot be reused.
You cannot recover a deleted eSIM profile.
Based on the carrier service you are using, you will need to request for new activation code to download your profile again on the same SIM. To add the profile again, follow the standard Add eSIM Profile procedure.
Certain carriers (such as Verizon), do allow reuse of the original activation code, provided the profile is being re-downloaded onto the same eSIM card (same EUICC). In this scenario, follow the standard Add eSIM Profile procedure to add your profile again.