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Re:7-zip 22.00 – APFS, Posix TAR, high precision timestamps by kkshetty on Thursday June 23, 2022 @05:28AM (#31846753)
Are you perhaps referring to the "7zip" package => https://packages.ubuntu.com/jammy/7zip ? It seems to be maintained by the Ubuntu MOTU Devs.

I searched a lot but couldn't find this "7zz" package you mentioned.

Re:7-zip 22.00 – APFS, Posix TAR, high precision timestamps by grumbel on Thursday June 23, 2022 @05:43AM (#31846849)
The "7zip" package is the official one. Linux support has been around before 22.00, but still relatively new. The old one is called "p7zip":

https://packages.ubuntu.com/jammy/p7zip

That one hasn't seen new releases since 2016.

The 7zz refers to the new binary name, which is different between the p7zip and 7zip packages.

Re:7-zip 22.00 – APFS, Posix TAR, high precision timestamps by chupasaurus on Thursday June 23, 2022 @05:42AM (#31846845)
dfsg in the package version is a note that it's been taken directly from Debian.