Adding an eSIM to a physical Smarty SIM. iPhone 15 (main physical SIM and eSIM work number)

Hi, I have recently moved from Vodafone to Smarty. I installed a physical SIM card from Smarty and then ported over one of my previous numbers (main number), this went through yesterday (30-06-2026) I now need to setup a Smarty eSIM on my iPhone to then transfer across my other number (a business number) but I can’t seem to see how to add the eSIM and then start the number port. All I can see to fine is a physical sim option with Smarty. Any advice would be greatly appreciated. Thanks Scott