"Deploy Red Hat Quay on OpenShift" guide indicates Quay Setup Operator is still developer preview in preface [1]. The "Deploy Red Hat Quay on OpenShift with Quay Setup Operator" guide's preface [2] is the expected content.

Deploy Red Hat Quay with an Operator: The Red Hat Quay Setup Operator is being developed to provide a simpler method to deploy and manage a Red Hat Quay cluster. Although currently available as Developer Preview...

[1] https://access.redhat.com/documentation/en-us/red_hat_quay/3.2/html/deploy_red_hat_quay_on_openshift/pr01

[2] https://access.redhat.com/documentation/en-us/red_hat_quay/3.2/html/deploy_red_hat_quay_on_openshift_with_quay_setup_operator/pr01