Rukah’s right, albeit with some nuance
Toa can form their elements as long as the environment allows them to do so, such as fire Toa making a flame as long as the environment allows for combustion - even underwater. As long as the molecular building blocks are there, it can happen.
…except for LEWA, who somehow managed to create air out of the vacuum of space that one time in Reign of Shadows because he’s Lewa and he doesn’t care or something
I’ve made a topic for it so we can discuss there as we’re already wildly off topic here.