is there any lua can skip option get signet ionis sanction?
Not seen one. However, Sanction requires you to choose from a bunch of options (Regen, Refresh, Food duration) so you'd still need to have the addon know what your preference was, if any.
I mean, really, it's one menu lol. You'd end up only having to target the signet NPC and then do //signet or whatever anyway because the NPC has other menu-based options (Conquest items etc.)
Both are probably the same effort.