Drop or rename scrape_config label

Question

I'd love to rename or drop a label from a /metrics endpoint within my metric. The metric itself is from the kube-state-metrics application, so nothing extraordinary. The metric looks like this:

kube_pod_container_resource_requests{container="alertmanager", instance="10.10.10.10:8080", funday_monday="blubb", job="some-kube-state-metrics", name="kube-state-metrics", namespace="monitoring", node="some-host-in-azure-1234", pod="alertmanager-main-1", resource="memory", uid="12345678-1234-1234-1234-123456789012", unit="byte"} 209715200

The label I'd love to replace is instance because it refers to the host which runs the kube-state-metrics application and I don't care about that. I want to have the value of node in instance and I've been trying so for hours now and can't find a way - I wonder if it's not possible at all!?

The way I'm grabbing the /metrics endpoint is through the means of a scrape-config which looks as follows:

- job_name: some-kube-state-metrics
      scrape_interval: 30s
      scrape_timeout: 10s
      metrics_path: /metrics
      kubernetes_sd_configs:
      - api_server: null
        role: pod
      scheme: http
      relabel_configs:
      - source_labels: [__meta_kubernetes_pod_labelpresent_kubeStateMetrics]
        regex: true
        action: keep
      - source_labels: [__meta_kubernetes_pod_label_name]
        regex: (.*)
        replacement: $1
        target_label: name
        action: replace
      - source_labels: [__meta_kubernetes_pod_container_port_name]
        separator: ;
        regex: http
        replacement: $1
        action: keep
      - source_labels: [node]
        regex: (.*)
        replacement: blubb
        target_label: funday_monday
        action: replace
      - action: labeldrop
        regex: "unit=(.*)"
      - source_labels: [ __name__ ]
        regex: 'kube\_pod\_container\_resource\_requests'
        action: drop

As you can tell, I've been trying to drop labels as well, namely the unit-label (just for testing purposes) and I also tried to drop the metrics all together. The funday_monday is an example that changed because I wanted to know if static relabels are possible (it works!) - before it looked like this:

- source_labels: [node]
        regex: (.*)
        replacement: $1
        target_label: funday_monday
        action: replace

Help is appreciated.