The Qubes + Whonix install guides have been updated to reflect the recent Whonix 9.3 Maintenance Release.
Qubes + Whonix: Wiki Documentation:
https://www.whonix.org/wiki/Qubes
Whonix 9.3 Maintenance Release Announcement:
https://www.whonix.org/blog/whonix-9-3-maintenance-release-testers-wanted