I can't speak about all EU countries, but the one country I looked into (Spain), I couldn't find a way to do everything remotely. It required being physically present for some things, so that's why I am asking about whether Estonia actually delivers IRL on the e part of e-residence.
Works great with z-Wave devices on a raspberry pi. I've got a few 433mhz sensors as well, integrated with all rtl-sdr. Also other raspberry pi devices taking to it via mqtt. Fun stuff.