I have heard of others getting photos vs autos from other seed brands as well, I have yet to personalty experience this yet myself but one day I am sure. I have also seen the opposite where one orders photo and they are sent autos.
One way to test this is to flip it to 12/12 and see if it starts to develop any signs of flowering, also it will show small pistils in veg when it is sexually mature and ready to flower but not yet in flower. So if there is any of that on the plant then it might be a photoperiod. I get this is not ideal outdoor but if its in a pot can bring it into a dark area to facilitate the test.
On the other side of this, I have seen some autos go for 10 weeks and not show any signs of flowering then magically they start out of no where where still on 18/6 light schedule. They can do a lot of weird things. Sometimes stress will make the plant enter flower, be it water or over fertilization.
I see two options for you, KISS, leave it as it and let it finish when it does, Or bring it indoor at night and keep it dark and flip to flower if it really is an photoperiod. I am leaning toward its a late showing auto vs a photoperiod.
Good Luck!
***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details:
growdiaries.com/giveaways/GotM-August-2022
Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***