I suspected it was going to be as easy as this. It is really the app to choose a suitable package, subscribe, get e-mail, and activate. I'm just not sure how you actually scan a QR code for an e-mail received on your phone (assuming you're setting this up using a public WiFi hotspot if you're already in a country (that's what coffee shops are for). It apparently includes a eSIM download profile with instructions.
Most are data only, but there are some with voice numbers. Without a voice calling number you can still accept calls on your primary voice number (at a cost often) or use the data to call via WhatsApp, Telegram, Skype, Viber, etc.
You can store multiple eSIMs on your phone too, and just choose which is active when. This also removes that risk of damaging physical SIM cards (or losing them).
Whenever I plan a trip to a new country, the first thing I research are prepaid SIMs. Messaging family, urgent work matters, on-the-spot research, all of