Forgive me if this does not relate to an X but on the S and 3 the sensation is more like "squeezing" it closed. Use an open hand with spread fingers, and flat palm, to distribute the force widely. Position said hand directly over the latch. Push down, slowly increasing the pressure, until you hear the latch engage.
I was afraid to use my frunk until I got comfortable with this.
It took a while to overcome years of habit developed during closing spring loaded hoods (dropping from about 14" seemed usually about right). It's a new and confusing world.