Did the compress middleware not work for you?

https://doc.traefik.io/traefik/middlewares/http/compress/

Are you trying to compress the request that has already come in to your cluster? I'm not sure there's a ton of value to be extracted there, since the requests have already made their way across the internet uncompressed to your ingress point.

If there's a "long way" to go after hitting your ingress controller then maybe there's something to be gained...