Hi Lucky! Your plant will have roots, it has grown some good fully opened leaves.
My old plant bloomed latent buds, leftover buds of previous season. It was not able to grow the little leaves properly which should indicate there is root formation below. So to double check then, after the little blooms died out, I pulled it out, true enough, no roots.
It helped me understand better the need to see those leaves form, that is why oftentimes, some would recommend removing the flowering part so the cutting can continue to concentrate forming roots instead. But I wanted to see what the blooms look like.
Sometimes Plumies do that, blooms before leaves forming ..or leaf forms then the blooms. So have to be careful in watering, and in our area, best to keep in part shade if our temps are still above 95F and higher. But it is Fall now, and our temps are really wonderfully warm and comfy for change! I have not moved any plants indoors yet.. a little extended season for us