Does anyone here use the odor remover box from critter love? Wondering if I should just put it over the newspaper that is in the bottom tray that I empty?

That is new to me, so no advice. One might be able to emulate such a thing by using a highly absorptive cat litter sprinkled lightly on top of the cage paper. Of course you would absolutely need to make sure they couldn't grab and eat the granules. Sugar gliders do stupid things almost reliably.