As mentioned I think it depends on the company.
In general I think an understanding of what a draft angle is and why it is needed, what sink marks are, basic differences in mold types such as split and open/close.
But hopefully it wouldn’t mean that the designer with 2+ years experience would be able to prepare files for the creation of a $100k+ tool. Myself for example hand over my CAD to a CAD engineer who has 20+ years experience in the job and turns my final design in to something that can be made. All under the supervision of an engineer as well as finally being signed off by the mold engineer too.