GitOps with Flux: sync status unavailable?

I have set up Flux for our deployments going by the tutorial in Gitlab docs (I’m using OCI artifacts). Deployments work fine as expected, but somehow, Gitlab fails to show me any Flux state:

What setting or configuration am I missing?

For anyone who might find this: I’ve been stupid. When configuring the environment, there is a dropdown for Flux resources:

I’ve been selecting my target namespace and have wondered why I don’t see anything under “Flux resources”. Instead, you need to select flux-system and then a Kustomization belonging to your deployment inside that namespace.