Another way is to create a "fake" combo box with a text box, a down arrow next to it, and a gallery below it. Click the down arrow to hide or show the gallery. The gallery can, of course, show pictures. Clicking an item in the gallery will send the data to the text box and hide the gallery.
This is working in the web browser, but from my Ipad I only get a white question mark on a blue background. Any idea of what might be wrong? I am starting the app from inside the ‘Power App’ app.