[jtakkala]

Correct, and generally known as ‘passport control’ in Europe and many other countries.

I think ‘immigration’ is primarily used by English speaking New World countries which historically had large scale immigration (as in, settlement) programs after the world wars—although I don’t have a definitive source for this.

[aix1]

Right, and in the UK we call personnel working at passport control immigration officers:

https://nationalcareers.service.gov.uk/job-profiles/immigrat...

https://en.wikipedia.org/wiki/Immigration_officer#United_Kin...