I did a small double take with this question because the English "He’s been to" is a past form of "he goes to" not "he is ". You can say "he was in France" but with a slightly different sense, more vague and without any emphasis on the going (UK English ). Perhaps this is my blind spot, but it isn’t a French construction I’d met before so I’d like to know if it’s a. common and b. idiomatic /informal?
(Apologies for reposting this question from a week ago: it’s gone from Q and A and wasn’t answered. Maybe the Helpdesk removed the post because I queried a similar sentence "On a été faire les courses = We went shopping" in a passé composé exercise.)