Make ded configurations of your assembly, one with all the parts and another with or hide the parts you don't want to see and then you can make your MEP as you want.
AC Cobra 427 gave you a good answer but personally, I prefer to create a display state for it instead of a new configuration.
For me, configurations are a variation of a part and doing that for an assembly can be risky.
In the new display state, hide the components you want. In your MEP, select the desired display state. If you have sectional, projected, or other views, the default display state is that of the master view (but it is possible to change it ).
It is therefore possible, for example, in the front view to display a view without the components, in the left view to display certain components and so on.
Kind regards.
PS: "ok I see. I am nevertheless certain that we can make an overview where we have hidden details. "
Yes, for a multibody part, it offers to select the bodies when creating the view. For assemblies, it only does this for cross-sectional views.
For me, the best solution is to create different display states for the assemblies.