No way.. there’s no point in doing it outdoor. You could argue it for indoor, but that’s with limited PAR from your light and needing an even canopy.
Outdoor in proper sunlight - there’s no argument you could make for topping it.
No. Autos have a predetermined life cycle which does not offer enough time to bounce back. I prefer to do some light LST- it really allows side branches to grow more and eventually provides more bud sites for you.
I’ve seen topping on autos do really good indoors in coco or hydro. But it only hurts your yield in soil 🌱