This should be fairly basic... I'm probably looking at it too hard.
I'm setting up a screen to look at information about locations. Data source is a Dataverse table -t_locations.
The intention is for the user to start typing text in the text box, which starts filtering on the gallery, ideally on any word not just the start.
The gallery's items = Filter(t_locations, TextInput1.Text in DisplayName)
If I type 'A' in the textbox, it starts to show the displaynames starting at A. typing any other character into the textbox, returns no results and the gallery is empty.