Water is standing on the base plate/sealing membrane

Hello,
the following situation exists at our new construction project:
In order to attach the bitumen waterproofing membrane along with the Styrofoam at the base, we as the builders dug a small trench on the north side at the request of the developer, because apparently there was too much concrete recycling from the construction road there and the executing employee couldn’t dig the trench quickly himself... whatever.
Now the work is done and the small trench is still there.
When it rains heavily, the trench currently fills up with water (the gutters and downspouts are already installed, but the infiltration shaft including rainwater drainage has unfortunately not yet been realized. The water from the downspout cannot be properly drained because the land rises at the back and the clay soil does not allow digging the necessary slope into the ground...) and the water level is just below the Styrofoam. A picture is attached.
I am now asking myself whether it is harmful if standing water presses against the foundation slab, both under the Styrofoam and, in the extreme case, on the Styrofoam, and whether it would be better to leave the trench as it is for now or to refill the trench up to the bottom edge of the Styrofoam before the next rainy days.
What are your opinions?

Best regards

at the request of the builder

And if the builder wants you to raise the walls, will you do that too? You are certainly paying a lot of money for your house, don't let the builder fool you. He has to coordinate the trades so that they carry out the work accordingly.

I am now asking myself whether it is harmful if standing water presses against the floor slab, both under the Styrofoam and, in the extreme case, on the Styrofoam, and whether it would be better to leave the trench as it is for the time being or to fill in the trench again up to the bottom edge of the Styrofoam just before the next rainy days.

I would first check whether the material used may be used there. Normally, in my opinion, XPS or similar belongs there. Styrofoam absorbs water.

The front is actually 1.5m away from the concrete recycling construction road, but unfortunately some material was carried over by traffic. The builder can't do anything about that either, but I understand what you mean. And whether it's Styrofoam or another material, I can't say for sure. I'll look into it.