Report of a child doctype

I have a child table which is connected the multiple doctypes as their child. I want to create a report of this child table on its own, without being linked to any of the parent doctypes it is a part of. Is it possible since ‘ref doctype’ in report filters out any child table so I can’t create a report of its own.

Also is it possible to apply user permissions on the linked fields of report filters out of the box like it does on normal linked fields of the form?

@Adeel_Siddiqui use script reports and you can generate any type of reports