How to improve upload performance, Nexus3 behind Traefik k8s ingress

Traefik Traefik v3 (latest)
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I’m testing Traefik as a Kubernetes ingress controller, having a performance issue with ‘docker push’ to Nexus3 behind Traefik. When pushing a 1.5GB docker image to Nexus3 via Traefik, takes 11 minutes. Doing the same with ingress-nginx takes only 59 seconds.

I installed Traefik v3.6.7 (chart version 39.0.0). My config is mostly defaults, only thing I changed is increasing the timeouts (large image uploads failed otherwise)

additionalArguments:
  - --entryPoints.websecure.transport.respondingTimeouts.readTimeout=1200
  - --entryPoints.websecure.transport.respondingTimeouts.writeTimeout=1200
  - --entryPoints.websecure.transport.respondingTimeouts.idleTimeout=1200

What can I do to increase upload speed performance?