If you selected the automatic update stream, updating Red Hat OpenShift Service Mesh doesn’t require any extra steps.
If you choose to update manually, the Operator Lifecycle Manager (OLM) controls the installation, upgrade, and role-based access control (RBAC) of Operators in a cluster. OLM runs by default in OpenShift Container Platform. OLM uses CatalogSources, which use the Operator Registry API, to query for available Operators as well as upgrades for installed Operators.
For more information about how OpenShift Container Platform handled upgrades, refer to the Operator Lifecycle Manager documentation.