You want a nice sweet fresh pineapple. The out of season bitter ones taste horrible when they are cooked. I would also aim for a pineapple that has not been sat in your fridge for a week, as the fresher the better.
Its an easy ratio to remember 1 teaspoon of cinnamon to 1 tablespoon of honey. So if you want to make a lot more pineapple then increase this ratio.
I also find that it needs to cook at 200c in order for the pineapple to be cooked hot enough to get the grill look.
Don’t overcrowd the pineapple as it will not cook very well and you will result in an airfryer of slush.