ARC fault: My impression is that is a US-only fire code requirement, the rest of the world does not care (please flame away if I am wrong)
Correct.
Ground Fault: I added some Midnite GFPD breakers, not too pricey
European installations tend to have a single GFI which feeds the main panel and provides ground-fault protection for the whole house, typically 100mA or even 30mA.
NEC: I wish they would UL test more of their 120V products. It’s not like the quality isn’t there, it just the paperwork.
It tends to be a pain for non-US companies without a local engineering presence (certification that is, listing is easier, but certification is a pain).