Pics 3 and 4, definitely flowering.
Pics 1 and 2, no evidence of flowering.
With Summer about to start in the Southern Hemisphere and the days getting longer, it is doubtful flowering will continue.
They will probably continue veg growth until about March, then flower.
The plants in pics 3 and 4 will most likely revert back to veg growth, but you could start with bloom nutrients now, if you think they will continue flowering, but if they go back to veg growth, obviously change back to grow nutrients.