Hi @Queeronics,
I came across this unanswered question while doing a community cleanup.
As far as I know, if you're the owner of the google slides presentation, you should be able to access it through google drive and share with others inside or outside your organization. If you are a student or you inherited the course from a different instructor, the owner of the slides presentation would need to give you a higher level of access or transfer ownership to you.
I hope this helps, even if it's a very late answer.
-Chris
