Hi Maren
We are on Totara Learn Ver 15, and the report source is - Seminar Sign-ups.
It looks like you may not have full access to creating a report
Who is included (content tab)
Report access given to Staff manager
And the approval option column is called Link to approval requests
Our version of Totara is pretty 'vanilla' so you should have these options if you have the permission to create User Reports. Unsure if you are a tenancy that would make a difference - may be worth having a quick chat to your Totara partner if you can't see what you would expect to see in the report building section.
Hope this helps
Ngā Mihi
Neil