I don't know why you posted a screenshot of the manual: we know of the manual looks like.
The "Show Me and Activate" function is recent, so it's not included in the manual, but if you have the latest update, you should have it, in addition to the "Show me this spot", which IS listed on the manual in the page you posted.
So, you should see BOTH options (in the sim, not the manual!!)
"Show me this spot", which JUST shows where the parking spot is, without selecting it.
"Show me this spot and activate", which shows the parking spot AND selects it.
Of course, the other two options, Yes or No (you are inside a question asking if you want a Follow Me) will also activate the gate.