Why hasn’t my auto flower flipped to flower yet

Saw on your diary that you use 9 liters on a 11 liter pot, that is way to much water, I really doubt that she is that thirsty, a third of what you watered should be more than sufficient.

Could be its not got the auto gene, i have had a few like that, flip to 12/12 and treat it as a photoperiod

Which Strain is it? It is unusual long for an autoflower. Have you tried to initiate with 12/12, maybe the genetic ruderalis marker is broken? not sure if possible, but 10 week veg on autoflower, unless you train it every 2nd day, isn´t common.

Maybe is a photoperiod ? try switch to 12/12

Continual over feeding with nitrogen in veg can delay and/or even prevent flowering. Your plant is certainly well over fed. Just go to 12/12 and treat it like a photoperiod plant. Genetics are not perfect either, sometimes the autoflower part just doesn't kick in.

Since you got a batch number on your seedpack you could ask the breeder. Not sure how Growers Choice works, but some other Breeder will tell you, if there is an quality issue with the batch of seeds. (If there aware of the issue)

week 10? then it's probably a photoperiod... one way or another... mislabled, pollen contamination, or maybe they half-assed the breeding process and didnt approach 100% auto outcomes? i don't know the exact breeding process... it may come with an inherent chance of a non auto offspring.. the genes involved would tell you if it's 100% or maybe just short of it - mathematical certainty of the biology invovled, not a guess. never bothered to look because i don't grow autos..