I think it varies, that kind of tech would only benefit a regular sit-down restaurants where the chairs are in fixed spots and constant. It doesn't work for a busy bar with me shouting "3 more beers" as the waiter walks by.

I assume the same or similar POS tech is used everywhere but in most places here I assume waiting staff either ignore it or charge everything to "chair 1" at the table, simply because so very very few ever split a bill to who ordered it. Since no one does, it's less work taking the hit when someone does (and asking people manually) rather than assigning orders to chairs all those times when no one splits. Obviously, that would also change if more people would split - so I'm guessing that with tech for splitting bills without staff help so prevalent here, it won't be common to have staff split bills.