No, with the Galaxus Travel eSIM you can't make regular calls or send SMS – it's a data-only eSIM.
Calls and messages do work without any problem through common messenger services like WhatsApp, FaceTime, Signal or Telegram. You can keep your existing SIM card active to make calls the traditional way. Just be aware that high roaming charges may apply abroad.
You'll find tips on how to save money abroad in this article.