Thanks.
Sorry about the wrong forum.
I didn’t realise that there were extra sub-forums when looking at the summary page here https://forums.opensuse.org/forum.php
I checked the package list above and also took it for a testdrive and did zypper pa|grep yast|grep qt and I do have the yast2-control-center-qt package installed so something else must be causing a problem.
If I type yast2 from the command line the command is not found.
Can you launch YaST from the command line to check for extra errors?