Then why they are so rare on the road compare to stop signs? I haven’t seen stats but my impression that in EU/UK there are at least 10x more yield signs than stop signs.

Because the US is obsessed with 3 and 4 way stops whenever they can (as opposed to a roundabout).

It's trivial to make a roundabout have yield signs. Some roads here are like that, where every 4-way intersection of stop signs is now a yield + roundabout. You can theoretically get all the way through without stopping.

But you can't have yields at a 4-way stop. Connecting 2 perpendicular roads at low speed is an incredibly common problem - the US chooses to do it in a stupid way.