kiosk VS Openshift Origin

Have a look at https://github.com/loft-sh/kiosk and maybe the paid version https://loft.sh/

Kubernetes was designed as a single-tenant platform. Sharing clusters, though, offers greater flexibility, simplifies infrastructure, and improves cost-efficiency. Therefore, it makes sense to use a multi-tenant system. To keep tenants separate and prevent compromised tenants from affecting others, you can use role-based access control (RBAC) or namespaces. Tools that assist with multi-tenancy in Kubernetes include kiosk and loft.

For simple environments I'm using klum, for bigger environments I'm using OIDC with Keycloak. Beside that kiosk also looks interesting.

https://github.com/loft-sh/kiosk (from makers of loft)

OKD: The upstream, community developed OpenShift version that is used in the other open shift distributions. Its source code is available on Github. The v4 Version uses the CRIO container engine. It also has a built-in image repository.

By way of example, let's troubleshoot the OpenShift Hello app, deployed with the following manifest. The key aspects of this manifest are as follows:

I don't understand what you mean here. OpenShift Origin is the repository that contains the conformance testing used for CNCF certification. I would encourage you to review the readme for the repository to understand it's current purpose, which is no longer to act as the central repository for all OpenShift code.