to my knowledge tomatillos won’t self pollinate at all. i think you might need to be the bee.
i know that with plants that will self-pollinate but don’t always indoors (like peppers), tapping the plant
enough to loosen some pollen enough to make the very quick hop onto another structure in the same flower can make it happen…maybe if you can use fans to make a turbulent wind situation and you tap the plants, you’ll get lucky? or just be a bee.