Approval policies are applied in entitlements so that you can manage resources in your environment.
To apply an approval policy when you create the entitlement, the policy must already exist. If it does not, you can still create the entitlement and leave it in a draft or inactive state until you create the approval policies needed for the catalog items and actions in this entitlement, and then apply the policies later.
You are not required to apply an approval policy to any of the items or actions. If no approval policy is applied, the items and actions are deployed when requested without triggering an approval request.