Did you make sure addressable header is sync in Armoury Crate(AC).
Ensure you go to the AC -> Devices -> ASUS ROG STRIX B550-I GAMING -> Addressable RGB -> set to Gen 1 or Gen 2 and adjust #LED.
Than go to Aura effects and set the effects to see if the strip works or not.
If not show up,
Sincerely,
TY