How to tap the pre-loaded photos in the camera roll in iOS UI test

TapPhotosInCameraPickerTests.swift

/*
     LIKE: The left hand expression equals the right-hand expression: ? and * are allowed as wildcard characters, where ? matches 1 character and * matches 0 or more characters.

     Resource: https://nshipster.com/nspredicate/
     */
    let yellowLeafGreenBackground   = NSPredicate(format: "label LIKE 'Photo, October 09, 2009, *:09*'")
    let waterfallCloseUpOverRocks   = NSPredicate(format: "label LIKE 'Photo, August 08, 2012, *:29*'")
    let treeWithWaterfallBackground = NSPredicate(format: "label LIKE 'Photo, August 08, 2012, *:52*'")
    let yellowFlowerSucculentBeach  = NSPredicate(format: "label LIKE 'Photo, March 12, 2011, *:17*'")
    let amazingWaterfall            = NSPredicate(format: "label LIKE 'Photo, August 08, 2012, *:55*'")
    // take note with this one, it is an HDR image
    let beautyFlowers               = NSPredicate(format: "label LIKE 'Photo, March 30, 2018, *:14*'")

    func testTappingOnSpecificImage() {
        // ... test setup and navigation to get to presented Camera Roll (PHPicker or UIImagePickerController)
        // trigger presentation of camera roll
        app.buttons["Choose from Photos"].tap() 
        XCTAssertTrue(app.buttons["Cancel"].waitForExistence(timeout: 3))
        let activeQuery = treeWithWaterfallBackground
        app.scrollViews.otherElements.images.matching(activeQuery).element.tap()
    }