Dashboard based on type/field

Hi,

Currently Kibana have dashboards at index pattern level.
What I am interested is to filter data by a type/field. I can do that by using Kibana queries.
But that query is visible in the search bar and someone can delete it and the dashboard is corrupted.

Can I have hidden queries or create dashboards on backend filters?

Thanks in advance.

Why not do it with a filtered alias?