Blender: geometry not bulging?

Question

3D

Tell me, please, what is the problem, I can’t boolean anything out of the geometry. I
used scale, move, extrude, insert, as well as the mirror modifier on
the geometry.
I did not see any problems with the network

Answer 1

Judging by the artifacts, you either have duplicate faces in the model itself or two identical models overlap each other, so you don’t see the result.

Answer 2

Oh, I see mecha from Kaino :)
ok, the thing is that you have two identical models in one place, and most likely you don’t see just the action of the bull tool