Solved pkg convert command not found

Hello all,

I have FreeBSD-12.3-RELEASE installed on an old laptop. I wanted to install some packages(.tbz format) from FreeBSD-9.2. So i stumbled upon convert command while reading pkg's manual page. But pkg doesn't seem to support it anymore. Am i making mistake somewhere or manual page is not updated recently?

The reason i am doing this is because laptop has old nvidia gpu and nvidia driver(304) only works on xorg's ABI version 19. FreeBSD 9.2 is the latest FreeBSD that has publicly accessible FTP repo with older packages. I also installed compat9x libs.

Thank you for your time, ayleid.