Is 9.20.1~dfsg.1-4 identical with the 9.22 Beta for Windows ?

I'd imagine the functionality is similar. Why do you ask?

9.22 Beta has necessary fixes and necessary improvements which is why I always say it's the minimum version to install, not 9.20.

If you report a bug then the version may get upgraded if the bug and security fixes are significant

It's not just 9.22. 7-Zip has gotten many new versions since, but most of them were Alpha, and I left a question whether the latest Beta is as stable as 9.22.

I do not know why 7-zip has provided several new "alpha" and "beta" versions, but nothing definite since 9.20.
You cannot expect that Ubuntu adds a new version that is still in "beta" status to its standard repositories.

I assume that we have to wait that http://www.7-zip.de/ provides a final version of 7zip (whatever version, higher than 9.20) that can then be packaged.

Now that I checked, https://sourceforge.net/p/sevenzip/discussion/45797/thread/d57804ea/ says:

- 7-Zip now can unpack UEFI BIOS files.
- 64-bit version of 7-Zip now includes additional 32-bit shell extension DLL.
  So other 32-bit programs can call 64-bit 7-Zip via context menu.
- Now it's possible to associate 7-Zip with file types without Administrator rights.
- New -mf=FilterID switch to specify compression filter. Examples:
    7z a -mf=bcj2 a.7z a.tar
    7z a -mf=delta:4 a.7z a.wav
    7z a -mf=bcj a.tar.xz a.tar
- 32-bit 7-Zip running under 64-bit Windows x64 now can use up to 4 GB of RAM.
- Some bugs were fixed.

I think 9.21 was what I meant with what I said, as those are changes in the core, not in the GUI.

Reporting a bug with all this is actually constructive.

Posting here doesn’t get anything done.