Hey Growmie
I have had this same issue before, If you're past week 5 or 6 and still not seeing any pistils or signs of flower, it's definitely possible she’s not an autoflower and might actually be a photoperiod. Autos usually start doing their thing around day 21–35, no matter the light cycle, so if you’re on 18/6 or 20/4 and she’s still vegging like crazy, she might be waiting on a 12/12 flip. Also, sometimes autos just “forget” they’re autos, genetics can glitch, and they need a little push to get into flower. Try switching to 12/12 for a few days and watch for pistils. If she starts blooming, the mystery is solved. Mine actually turned out to be that they “forget” they were autos, I switched the light cycle, and that fixed everything!