If you accidentally delete your eSIM, you will need to have a new one issued. This is due to eSIMs being single use and single installation.
If you only have access to your provider's interface, you will need to reach out to them in order to get a new eSIM.
Please refer to the guide here to see if you are able to replace your eSIM with a new one. If you are not, you will need to reach out to your provider (whom you have your subscription though) to get a new eSIM issued.