No. A regional Europe plan works across the whole covered area on one profile. You do not switch anything at the border, and you do not install a second eSIM.
Whether regional is the right choice depends on how many countries you visit. In our catalogue a 5 GB / 30-day regional plan averages about 38 USD, while the same size single-country plan averages about 28 USD. So regional costs roughly a third more.
The rule that follows: one or two countries, buy single-country plans. Three or more, buy regional. Below three countries you pay a premium for coverage you will not use.