Before the pandemic, when office work was normal, immigration people came by the company I was working at to see which foreigners were working there, and had a 10-15 min interview with each of us. Nothing nasty or even impolite, but they wanted to see the documentation.
Also, they came by the accounting company that manages my salary and tax here to check the documentation and see that I was signing for my salary receipts (haven't done that in a while, actually, now, need to catch up I guess).