Discourse not support proxy_protocol

Is there any change concerning support for the proxy protocol ?

In our setup we currently use haproxy for ssl termination and apache2 as outer rev-proxy which then connects to a unix websocket for the web_only discourse container. I want so switch to nginx for the outer rev proxy and also implement the proxy protocol which is also supported by haproxy.

It looks like the web_only container and the nginx inside still do not support the proxy protocol. Is this correct?