Ubuntu Studio Settings Default Applications lists no installed Web browsers

[L. P. Luigi Espenlaub]

Note: found Apport reports "Package: systemsettings 4:5.24.6-0ubuntu0.1" and "systemsettings" was rejected in the package field as "Not part of Ubuntu" Confusing, bug with Apport or Launchpad?
I need to learn where in the Apport report the package information Launchpad is expecting is found so I can be more specific next time.

Note: there is a related bug I have uploaded with an Apport file that may point to a common underlying problem titled "Choose another application for HTTP; lists no installed Web browsers" Bug #2006439

To Reproduce
1. Load Ubuntu Studio Ubuntu Studio 22.04
2. Application Launcher > Settings > System Settings > Default Applications > Web browser:
3. Click on Other
Find the only option is "Other" in the drop down menu.
[No other option for finding and specifying a web browser is provided]

Installed web browsers:
Firefox,
[for testing purposes]
KDE Plasma Desktop - Web browser,
WebArchives,
Chromium,
WebTorrent

While not a system stopper, I look forward to a fix for other users and myself of this Amazing OS and Set Of Applications that you magical people have created. That is, a fix that keeps some part of Ubuntu Studio from nagging myself and others to "Choose an Application to open the HTTP link." then not providing a way of doing it.

System Description
Operating System: Ubuntu Studio 22.04
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: systemsettings 4:5.24.6-0ubuntu0.1
ProcVersionSignature: Ubuntu 5.15.0-58.64-lowlatency 5.15.74
Uname: Linux 5.15.0-58-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Tue Feb 7 00:58:43 2023
ExecutablePath: /usr/bin/systemsettings
InstallationDate: Installed on 2023-01-11 (26 days ago)
InstallationMedia: Ubuntu-Studio 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809)
SourcePackage: systemsettings
UpgradeStatus: No upgrade log present (probably fresh install)

[Erich Eickmeyer (eeickmeyer)]

Attempted to reproduce, could not *except* in Wayland session, which is not supported. Wayland, per the release notes, is experimental in this release. The Firefox Snap is default, which if removed, would also cause this issue.