33T was always possible for 110 BCD cranks, it's just not common.

For the smallest chainring sizes, it sounds like FSA has been developing rings where the bolts go *through* some of the teeth: TPE16: FSA gets Modular with new cranks for MTB, Gravel, and Road, plus steel Comet 1x chainrings - Bikerumor

I'm skeptical of 30T on a 110 BCD, though. I wonder if they use a smaller BCD for the 46/30 combo, and neglected to mention that on their page.