hi Proph Welcome to the ROG forum.
According to G.SKILL QVL MAXIMUS IX FORMULA is supported
It seems like weird , any photos screenshot about
No Trident Z RGB modules installed?
Try only install single at slot testing or try reinstall AURA software/OS
others example , How to control G.Skill Trident Z RGB with Asus Aura
https://www.youtube.com/watch?v=_jZs0fuZhrEif still cannot work, advice to contact G.SKLL for RMA