But you can look at an issue, see there 3 of your coworkers sticking an eyes emoji on it, and mention them when asking what they think it, get clarification if they've just seen and didn't care, are still digging deeper etc.

In a way, the imprecision is what gives the versatility, otherwise many emoji get a more limited, standardized meanings over time. Like a "done" sticker that will be enough to give a status on a request on a channel, a thumbs up on a proposition, or a green checkmark on things that explicitely needed to be checked.

People get pretty good at reading body language. The problem is you never know what conversation the person is having with themselves.