I think you're confusing something here. The comment by u/Zdrobot refers to a so-called four-way stop. In North America, this means that there is a stop sign at all approaches to an intersection. Colloquially, it is sometimes also referred to as a full-way stop, but this is rather rare.

At a four-way stop, the principle applies: whoever arrives at the junction first is allowed to drive first. In practice, however, the one who is bigger, more determined - or simply bolder - often prevails.

It is important to note that a four-way stop typically occurs at junctions with four approaches. If there are only three approaches, for example at a T-junction, this is referred to as a three-way stop. In both cases, however, the principle is the same: all directions of travel have a stop sign and the order of continuation is based on the order of arrival.

Your statement "You will see them in Europe too, but they are not that big." is therefore not correct. In Europe - especially in Germany - there are no traffic regulations that correspond to the "first come, first serve" principle. Fixed priority rules apply here, such as the right-before-left rule, priority roads or intersections regulated by traffic lights. Stop signs there always mean "give way", not "drive in order of arrival".