Hi there!
When it comes to using an eSIM abroad, the charges will depend on your specific phone carrier and their policies. It's important to check with your carrier, Vodafone, to see if they have any international roaming options or packages that you can purchase to avoid any surprise charges while using the eSIM abroad.
In some cases, you may also need to purchase a local SIM card in the country you're traveling to if Vodafone doesn't have good coverage or if they don't offer affordable roaming options. This would mean that you would have a separate bill for the local SIM card usage in addition to your Vodafone contract.
I suggest contacting your carrier, Vodafone, and asking about their international roaming policies for eSIM. They can give you information on any additional fees or charges you may incur while using eSIM abroad. It's also a good idea to check with the countries you plan on visiting to see if they have any restrictions on eSIM usage or additional fees.