Don't forget to stay hydrated.🍉🍉🍉🍉🍉

and supporting circuitry

As far as it seems, that one should be the same. Just with the chip soldered-on instead of having a SIM slot.
Here’s a guide on XDA forum on how you can just solder eSIM chip onto regular SIM contact pads and manage the eUICC with OpenEUICC Magisk module on OnePlus 11.

Osmocom reports some devices may recognize it as internal eUICC if the OS has LPA software.

By the way, there’s also lpa-gtk, based on lpac which allows use of eSIM on some Linux phones.

Seems to be accepted in Slovakia. 3 out of 4 carriers charge for eSIM.

And that assumes it’s free.
Some carriers will charge you for a new eSIM.
Oh, you want more funny shit? My carrier charges €4 for a physical SIM, but €8 for eSIM.
Another carrier around here even offers you a new SIM for free when signing up. But if you want eSIM, that’s €10. Oh, and yeah, the code you get is single use. Want to move to another phone? You need a replacement eSIM. That’s another €10 because fuck you.