Using cargo git = linker2-proxy not working

If I try to do in Cargo.toml:

linkerd2-proxy = { git = "https://github.com/linkerd/linkerd2-proxy", tag = "release/v2.185.0" }

It imports but I cannot use it. How do I access this in my Rust app?

From what I see, linkerd2-proxy is a standalone application, not a library... It contains some internal sub-libraries named linkerd-*, but probably without much use beyond the app itself.