AT one operator I worked at, the requirement for the exit rows (o/wing B737) to be occupied changed during my employment.
IIRC, min 2 in each row (so 8 total) whereas previously they were not required to be occupied at all.
On B767 however, there was no such requirement. The logic being B737 are 'self help' exits and as such crew are not seated by them for takeoff/landing but on B767 having crew sitting between the o/wing exits meant the pax became... excuse the term- irrelevant on that point.
Probably also because the o/wing on the 767 is slightly more complicated- though if the crew were down & pax opened it, they're not necessarily going to worry if the slide's deployed or not, as they'd go off the back of the wing anyway....
F100 (at the time I flew on it) had no requirement as crew were assigned to those exits in an emergency (no rear doors to man)