m0useanswered grow question 2 years ago I am going to say its leaning toward photoperiod because it is from Bag Seed and the weed your getting on the market is almost always photoperiod as the yield and management of the plants are much easier. And plants 100% show there sex when they are ready to flower even in veg. it means they are mature and ready but will not fully flip to flower till the light cycle or photoperiod changes. This will show by small pistils developing out of nodes on females but buds will not form just single pistils.
As for bag seed there are some risks to it and ifs its all you got, then ok, but idealy you should being growing gentics you know the orgin of. The risk comes from not know where the pollen came from that made the seed, Was it self pollinated meaning its a hermi. That's not something you want to keep growing as it could do the same thing again and make your entire grow seeded. just a lot of unknowns that arn't worth it in my experience, but on the flip side of that coin, some of the best weed in history came from bag seed at a grateful dead concert. soo make your call. I have also growing bag seed, and out of it one was male, and one was hermi two females and they where good but if I wanted to keep growing them there genetics are not robust and would have more and more problems each generation.
PS. I have seen some autos take upto 9 weeks to enter flower before, it is because they are getting crossed a lot and can stay in veg for extended periods of time now.
No harm in flipping to 12/12 if you want it to bloom now.
Best Of Luck!