I'm trying to add a list of spells automatically known to the storm sorcerer, like what the psionic sorcerer has, but I can't figure out how to make them automatically known instead of just expanding the spell list. Does anyone know the process?

Are you talking about adding them to a character sheet on dnd beyond or just finding spells to add

to the character sheet I guess. I'm trying to use homebrew to alter the subclass to essentially give it a list of domain spells