Hi Moo Maid and congrats on making this cheese. It is not one of the easiest at all.
Just wondering if you have been aging this in the fridge at a colder temp than recommended, as the white bloom usually takes around 5-8 days to completely cover the cheese.
If these are 12 days old, then I think that I would cover then and continue aging. If you are going to age them in the fridge, then they will take 2-4 weeks longer to ripen, but they seem to fair much better at the colder temp, then a warmer temp.
They are looking good at this stage, so hopefully they will age gracefully for you.
Keep us informed of their progress.