macOS Monterey: "This app will not work with future versions of macOS"

Could you click “Learn More…”? If it’s a public web page, you can post the link rather than screenshot it all

I don’t have a Mac, and when this initially came up there wasn’t any information search could find that fit…

This might need more volunteers with macOS who can help (especially if you have some developer skills).
Duplicati team is low on volunteers in general (any out there?), and might be especially low on Mac ones…

because a problem that no volunteer can even see is a problem that the volunteer can’t really investigate.

Duplicati is a community effort and is limited by what volunteer resources the community will provide to it.

Welcome to the forum @raymanoz

Could someone here please help on:

It sounds like it’s successful except some future version is in question, but I don’t want to speak for you…