Installed:

$ sudo dnf upgrade --enablerepo=epel-testing --advisory=FEDORA-EPEL-2022-d6609a7659
Updating Subscription Management repositories.
Extra Packages for Enterprise Linux 8 - Testing 610 kB/s | 505 kB     00:00    
Last metadata expiration check: 0:00:01 ago on Fri 19 Aug 2022 11:49:00 AM CEST.
Dependencies resolved.
================================================================================
 Package             Architecture  Version            Repository           Size
================================================================================
Upgrading:
 python3-xapp        noarch        2.2.2-2.el8        epel-testing         44 k

Transaction Summary
================================================================================
Upgrade  1 Package

Total download size: 44 k
Is this ok [y/N]: y
Downloading Packages:
python3-xapp-2.2.2-2.el8.noarch.rpm             431 kB/s |  44 kB     00:00    
--------------------------------------------------------------------------------
Total                                            60 kB/s |  44 kB     00:00     
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                        1/1 
  Upgrading        : python3-xapp-2.2.2-2.el8.noarch                        1/2 
  Cleanup          : python3-xapp-2.0.2-2.el8.noarch                        2/2 
  Running scriptlet: python3-xapp-2.0.2-2.el8.noarch                        2/2 
  Verifying        : python3-xapp-2.2.2-2.el8.noarch                        1/2 
  Verifying        : python3-xapp-2.0.2-2.el8.noarch                        2/2 
Installed products updated.

Upgraded:
  python3-xapp-2.2.2-2.el8.noarch                                               

Complete!

re BZ#2116804 :

$ python3 /usr/lib/python3.6/site-packages/xapp/SettingsWidgets.py
$ echo $?
0

$ /usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py        
Using pam module (python3-pampy)

Settings window has been displayed.

$ echo $?
0

Just a note that this update without fedora-license-data in EPEL 8 stable ( https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2022-9a2419fa2e ) make it impossible to update system:

Error: 
 Problem: cannot install the best update candidate for package rpminspect-data-fedora-1:1.8-1.el8.noarch
  - nothing provides fedora-license-data needed by rpminspect-data-fedora-1:1.9-1.el8.noarch

I can't wait to get this appear in stable. On RHEL + EPEL 8 I'm missing this dependency:

Error: Problem: cannot install the best update candidate for package rpminspect-data-fedora-1:1.8-1.el8.noarch - nothing provides fedora-license-data needed by rpminspect-data-fedora-1:1.9-1.el8.noarch

This enables mock working again: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-2d4b482b6f

Apparently mock is missing this https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-2d4b482b6f feel free to try that one and add karma there.