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The output of your command "$ man pwdx" is:

PWDX(1)                          User Commands                         PWDX(1)

NAME
       pwdx - report current working directory of a process

SYNOPSIS
       pwdx [options] pid [...]

OPTIONS
       -V, --version
              Output version information and exit.

       -h, --help
              Output help screen and exit.

SEE ALSO
       ps(1), pgrep(1)

STANDARDS
       No standards apply, but pwdx looks an awful lot like a SunOS command.

AUTHOR
       Nicholas Miell wrote pwdx in 2004.

REPORTING BUGS
       Please send bug reports to procps@freelists.org

procps-ng                         2020-06-04                           PWDX(1)