Unfortunately, the DisplayCAL frontend for ArgyllCMS has been kicked out of OpenSuSE because it had stuck with Python 2. Now there is a Python 3 version of this software available at GitHub https://github.com/eoyilmaz/displaycal-py3. Its maintainer has also created a spec file for the RPM https://github.com/eoyilmaz/displaycal-py3/issues/235. Some details of the spec file will have to be edited, though (the target directory, for instance).
Now somebody will have to build a ready-to-use RPM package of DisplayCAL. I can't do that myself as I "only" have OpenSuSE 15.4 with its age-old Python 3.6, the current OpenSuSE 15.5 beta still contains 3.6, and DisplayCAL requires at least 3.10.
So: What can we do to get the RPM done? For myself, I have zero experience in building RPMs. Thank you.
Kind regards Jacek Rużyczka