People Picker in list box question

I was able to get this to work with you help of this link c-sharpcorner.com/blogs/create-custom-people-picker-control-in-powerapps and was wondering how I get it to work for 3 different slections.  Requestor, Approver, and manager?  When I change one it changed all of them to the same one.  I am guessing it is a change in the defualt setting of the text box I tried this in a few different ways but still does not work.  RequestorListBox.SelectedUserDisplayName  any suggestions.  Thank you so much for any help you can provide.