Hey
This page seems outdated when reading it: https://help.ovhcloud.com/csm/fr-public-cloud-kubernetes-vrack-example-between-private-networks?id=kb_article_view&sysparm_article=KB0055408
It helpfully states:
The method described in this tutorial is a temporary one, only required if you want to route traffic between different private networks in a single vRack. Our Managed Kubernetes team is working on a more streamlined solution for this advanced use case, as explained in this issue in our Public Cloud roadmap.
That issue has been closed in 22H2: ovh/public-cloud-roadmap#116 (comment)