How do I contact the UFW developers to make a feature request? [duplicate]
The link https://packages.ubuntu.com/impish/ufw contains package information and a load of other details, and is a start.
You'll find a bug reports link (where you're wishing to make a feature request).
Please ensure the feature doesn't already exist (esp. if you're using an older release; ie. check in the development release first).
You'll also note the suggestion to
ask a question via Launchpad before contacting the maintainer directly
so I'd suggest doing so (a launchpad question can be converted into bug report/feature-request and will likely carry more weight) ie. https://answers.launchpad.net/