Both of my kids submitted without me seeing the application.
One was working with a private college counselor and the other worked with their school counselor.
I gave general advice when asked and when I wanted (many times when they did not want it) but I never saw the full application for either.
I did help with the resume for each of them because I review resumes for my job and both kids trusted my opinions on that.
I also helped brainstorm and remember extracurricular activities, remind them of things they accomplished or whatever they forgot and gave ideas about what they could write essays about, mostly brainstorming options and reminding them of things they liked at school visits so they could make their applications personal, but I didn't see any final versions.
They both got into lots of schools and liked their final picks.