OpenAtlas

Dear Alex, dear team of the OA,
at the SHAHI Project we need to add features as niches, caves, chapels ect. to different places. For example: Place: Bamiyan -> Feature: niche1 with buddha, niche2 with Buddha, niche3 ect. I remember at the Thanados Project there is a butten "+Feature" where I can add as many graves for example as necessary to a place. At Shahi-OA there does not exist such a possibility or I can just add one Feature. Is this a main-setup-issue or can I change it directly? Attached you find some screenshots about the situation,
thank you so much for your help, all my best, Sandrina