Good afternoon,
I am currently working on an app that that requires a field to select multiple users. I am currently using the person template provided from Microsoft which allows me to select multiple users

this field is currently called "peopleaddedgallery1". I would like to push all users that have been selected to a field on a different screen. I currently have the info pushing to a button and that only displays one user.

Using the following formula PeopleAddedGallery1.Selected.DisplayName
How can I make this button display all fields. I have tried the concat function but cant seem to get it working. Any help would be greatly appreciated.
Thank you