are you talking about this diary??
growdiaries.com/diaries/293716-grow-journal-by-eojburnner420
Autos can be dicks and take forever for flip sometimes but more often then not they bolt into flower too early.
There is also the possibility the wrong send were sent and you did not notice and really they are fems.
worse case, flip to 12/12 matching the same DLI your giving on 18/6 and see if that helps. takes about 2 weeks to kick in fully. 1 week maybe some symptoms like pistils.
This is the branded page for that strain your growing. But for w/e reason on your diary it is not linked to the official product its a custom entry.
growdiaries.com/seedbank/growerschoiceseeds/cream-autoflowering
Of all the diaries with harvest, they all seem to be reporting its in flower around week 5 or 6
online I don't see a cream photoperiod but I do see an ice cream auto/photo on their main webpage, could this have been mixed up? do U have the pack or pictures the seeds came in?
One other note: the tag you have in the pot was for northern lights then changed to cream.
was this also an auto or photo? and was it planted in the same pot and did not pop then cream was added in after??
Maybe the cream did not in fact germinate but the old northern lights did? and if the northern lights was a photoperiod, this this might be why it has not flipped.
More of a left field guess but i think that's all the options. and TBH I don't even know if 12 / 12 does anything for autos. its just a guess if its a hybrid with some photoperiod in it.