Some questions about deploying PQC

I read Cloudflare’s blog post about PQC, and I’m a bit concerned about the quantum security of the systems I manage. Some of these systems are running older versions and provide important services that can’t be updated immediately. But I have a plan: I could use Docker to run a PQC-capable NGINX and then have it reverse-proxy to the old NGINX via a Unix socket. Would this provide a certain level of quantum security?
When Cloudflare request to origin server, does it use PQC algorithms like ML-KEM?
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