At work I'd let your eyebrows do the talking! You don't need to actually say anything, just raise one high enough, what are people going to do? report you for a facial expression?
That's very funny. I can't actually raise one eyebrow, but perhaps I should practise a sceptical expression. Many of my work meetings take place over Teams or Zoom, which means I can see my own face, unfortunately, and most of the time I try and look as blank as possible.