As long as you have some space between the door and the valve, there will most likely be no problems, nor any noise development, because supply air valves blow to the side. Of course, a few pictures of the situation would not be wrong.
If that was planned and agreed upon beforehand, then from my point of view the GU is by no means out. Otherwise, he could simply place the connection for the doorbell at a height of 2 meters, since it is [EL].
If that was planned and coordinated beforehand, then from my point of view the main contractor is by no means off the hook. Otherwise, he could simply install the connection for the doorbell at 2 m height, since it is electrical work.
Yes, you are right. It must at least be included in the planning so that other trades can align with it.