GitOps does show up in the OperatorHub in general, however when you filter by "Disconnected" in the left-nav's "Infrasture features", that's when the GitOps Operator doesn't show up. I've attached a few screenshots (apologies for the really tall ones; can't collapse all of those left-nav items!).
 
It is seemingly because the Operator doesn't have the related annotation set in its CSV. As an example for an Operator that does show up as supporting disconnected, see the screenshot showing where DataGrid has some "Infrastructure features" listed on its details pane, however GitOps doesn't list any.
 
The following doc shows where that required operators.openshift.io/infrastructure-features: '["disconnected"]' annotation (and a few other requirements) can be set:
 
https://docs.openshift.com/container-platform/4.9/operators/operator_sdk/osdk-generating-csvs.html#olm-enabling-operator-for-restricted-network_osdk-generating-csvs

cc: rhn-support-adellape