Do distro maintainers share patches, man pages, call home metrics and other data with other distros’ maintainers (and them back)?
Further, do they publish any change information publicly?
Further, do they publish any change information publicly?
Yes, at a minimum the patches are in the Debian source packages. Moreover, maintainers are highly encouraged to send patches upstream, both for the social good and to ease the distribution's maintenance burden. An automated tool to look for such patches is the "patches not yet forwarded upstream" field on https://udd.debian.org/patches.cgi
This is utter FUD, of course they do, it is an open source distribution. Everything can be found from packages.debian.org
You seem to be assuming malice in an innocent question though, that’s on you.