Shell not completing executables

Is it intended behavior that hyperfine CLI doesn't autocomplete executable files from $PATH?

I personally use fish, and looking at the src/cli.rs and ValueHint documentation of clap, it looks like support for CommandString and ExecutablePath is "Partial", while fish doesn't support positional arguments and "dynamic" support is in general limited to some hints: am I right in imagining this would be an implementation improvement for clap/clap_complete themselves and hyperfine could benefit directly from it?

Apologies if this is not really a bug about hyperfine.