When installing the Compliance Operator on ROSA, users will need to make sure they modify the node selector so that the Compliance Operator will get scheduled on worker nodes.

https://docs.openshift.com/container-platform/4.15/security/compliance_operator/co-management/compliance-operator-installation.html

Here is an example of what needs to be added to the installation documentation for the Compliance Operator to run on ROSA:

https://github.com/ComplianceAsCode/content/blob/master/ocp-resources/compliance-operator-rosa-subscription.yaml#L12-L13