But what if we want, Selection without select with long click?
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You can start selection mode via a mechanism called “selection hotspot” without long tap. If you want single-tap to select, just override inSelectionHotspot(e: MotionEvent) to return true.

object : ItemDetails<String>() {
override fun getPosition() = holder.adapterPosition
override fun getSelectionKey() = holder.itemId
override fun inSelectionHotspot(e: MotionEvent) = true

The official documentation for the selection hotspot can be found here.