Dunno, but I agree with the advice to wait. As I have 7 gals in a tub. All clones, from the same Mom and all sharing the same water, air, lights and nutes. Flipped 2 weeks ago. And even the almost dead one is showing nice flowers. But, one of the hardiest (best roots and healthy). Isn't showin' squat. Like yours, just some green pistils. So I'd say wait. Maybe it's a short bus candidate like mine?
It has some nice branches. So when it does finally kick in, it should yield well (crosses fingers). I'd post pics, but they's sleepin' now. I'll add one tomorrow.
Here's how the rest of them look
View attachment 2650909
Good luck
R2T