Hello @Oya-Erdayı
you can explicitly say which object types a group can see, edit, etc.. In the following article you can find an example of CMDB permissions with short explanations. https://kb.i-doit.com/pages/viewpage.action?pageId=61014337
For example, you can set the "Object(s) of type" right so that all but a few selected object types are hidden.

Best
Phil