Via Instagram, while they're showing off pictures of their kids and their hobbies... yes? Do you show only your coworkers, what, system diagrams of work things making the between work times still also about work?

Different places have different cultures, apparently your coworkers aren't to know anything about you beyond what's necessary for them to work with you, but across the whole world, not everywhere is like that, and it seems unnecessary to state that you don't live in such a place in that way.