Is there a Homebrew package (or other source) that installs a macOS (Ventura 13.3.1) version of
Yes, brew supplies the
texinfo package, so named for the official GNU project. The same package name is common across many of the popular packaging systems for macOS and Linux alike. (Other Un*xes are available ;-)
brew search info would have revealed it to you.
The brew version is the only one on my Ventura machine. Ventura doesn't ship
/usr/bin/info it seems. Nothing in
/usr/share/info either. This is probably due to
texinfo now being licensed under GPL-3, though as always IANAL.
Further research based on https://opensource.apple.com/releases/ shows indeed that
texinfo disappears between the release of macOS 12.5 and 13.0