No, if you already have an eSIM covering the new country, you can simply top it up with a new package. Click the banner on the home page showing the country where you are currently located and check if the eSIM you own is covering your destination. Check the other offers too. Sometimes getting a new eSIM may be cheaper than topping up the one you already have.
Tip and tricks: if you are not in your destination yet, change the country by clicking “Check another country” at the top of the page.