https://ferrand-d.medium.com/paging-image-gallery-with-recyclerview-f059d035b7e7

PagingImageGallery_translateChildrenToVisuallyAnchor.kt

var translationXForward = 0f

for (i in 0 until childCount) {
    val translationXFromScale = ... // like before
    child.translationX = translationXForward + translationXFromScale

    translationXForward = 0f

    if (translationXFromScale > 0 && i >= 1) {
        // Edit previous child
        getChildAt(i - 1)!!.translationX += 2 * translationXFromScale
    
    } else if (translationXFromScale < 0) {
        // Pass on to next child
        translationXForward = 2 * translationXFromScale
    }
}