Found another place where we have Che content in the CRW docs:

https://access.redhat.com/documentation/en-us/red_hat_codeready_workspaces/2.1/html-single/administration_guide/index#codeready-workspaces-postgresql_workspace-controller

There's a table with links and image references:

Source code: CodeReady Workspaces Postgres ==> https://access.redhat.com/containers/?architecture&tab=docker-file#/registry.access.redhat.com/rhel8/postgresql-96/images/1
Container image: eclipse/che-postgres ==> registry.redhat.io/rhscl/postgresql-96-rhel7:1-47 registry.redhat.io/rhel8/postgresql-96:1

and then for https://access.redhat.com/documentation/en-us/red_hat_codeready_workspaces/2.1/html-single/administration_guide/index#codeready-workspaces-keycloak_workspace-controller here are the corrected links/refs:

Source code: CodeReady Workspaces Keycloak ==> https://access.redhat.com/containers/?architecture&tab=docker-file#/registry.access.redhat.com/redhat-sso-7/sso73-openshift/images/1.0-15 (link label should be "Red Hat Single Sign-On", not "Keycloak")
Container image: eclipse/che-keycloak ==> registry.redhat.io/redhat-sso-7/sso73-openshift:1.0-15

Note that the tags will change for 2.2, so if you fix this in 2.1.x, make sure you can set the image tags are as variables.

Latest images for 2.2 are:

• https://access.redhat.com/containers/?architecture&tab=docker-file#/registry.access.redhat.com/rhscl/postgresql-96-rhel7/images/latest (currently 1-53)
• https://access.redhat.com/containers/?architecture&tab=docker-file#/registry.access.redhat.com/rh-sso-7/sso74-openshift-rhel8/images/latest (currently 7.4-1)