No idea. We talked to the DD about it. Maybe they’re content with the software working in testing and sometimes in stable.
Of course in theory they could also try to backport the changes, but I doubt anyone would bother for anything that’s not hugely popular. I’m tired of distro patches generating support load anyway.
If I were to guess, youtube-dl fits the bill... just like browsers, it has the problem that it needs to update far more frequently than any OS/distro schedule allows.
Except Debian backports yt-dlp for Stable. That's why the answer is backports. If it works for something like yt-dlp, it should work for something similar, especially if it's already in Testing (since that is usually the source for the rebuild for Stable).