A LoadBalancer Service has a .spec.healthCheckNodePort that Traefik will respond to (on any path) with a 200 if Traefik itself is healthy. When deploying Traefik as a NodePort there is no .spec.healthCheckNodePort and hitting /ping, /healthz, and /traefik just returns 404s (likely because there's no Ingress for those routes).
What are you supposed to use as the node health check in a situation where you want to use a NodePort Service and your own managed load balancer?