This is a clone of issue OCPBUGS-31878. The following is the description of the original issue:
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The multus-admission-controller does not retain its container resource requests/limits if manually set. The cluster-network-operator overwrites any modifications on the next reconciliation. This resource preservation support has already been added to all other components in https://github.com/openshift/hypershift/pull/1082 and https://github.com/openshift/hypershift/pull/3120. Similar changes should be made for the multus-admission-controller so all hosted control plane components demonstrate the same resource preservation behavior.