I don't have RGB ram so I can't say for sure but check two places.
1) In the Armoury Crate device list, click on your ROG Strix Z690-A motherboard and see if your ram shows on any of the tabs.
2) Aura Creator - In the Armoury Crate device list click Aura Sync, click the Aura effects tab, click the Aura Creator button near the middle. At the top left of Aura Creator click "Available devices".
Do you see your ram? If not, click on PC components beside Device.