There’s a lot in that picture that isn’t fantastic. Lead outlet isn’t done but the first layer of flat roof has been. I’d want it under all the layers. The fascia on the right has been done. How is that edge going to be finished?
I’d have done flat roof first, then all the flashing to that, fascia, then tile
I still wouldn’t screw though the lead and after all flat roofs do take water… The problems arise with standing water/age