You can upgrade to a bigger service plan (scale up) or you can get another instance (scale out).
This is the STACKIT IP range, so access from outside STACKIT is blocked if you do not change this. It is recommended to narrow it down to your specific networks.
We create a public instance for use with Kubernetes and VMs and and an internal instance within the AppCloud
Feel free to create a service request in the STACKIT Help Center.