Docker swarm and k8s clusters on the same bunch of Raspberry PIs

I am running a docker swarm cluster (with traefik) a on a bunch of Raspberry PIs, and thinking how to run a k8s cluster next to it - on the same RPIs. The later works fine with nodePort, now I am looking at how to expose it via ingress&traefik - is that possible at all - I mean two traefiks in two clusters on the same network/hardware? I was thinking about using alternative http/https ports - is that the right direction? Or, better dsitinguish the traffics to two traefiks by host names and paths? Using k3s and an off-the-shelf helm chart to install the 2nd application.