Hello,
First, repeating what was posted above, ordinarily questions posted to this Forum are related to official releases, not Beta or RC.
Also, RPi is a very special deployment. Congrats on getting it working as much as you have because IMO the odds are small if you don’t use a prepared image because of the many ARM patforms. For this reason, I suggest you read the blogs of the people who are pioneering openSUSE on RPi.
If you want to forge ahead with what you have, instead of waiting for or compiling YAST yourself I’d recommend using zypper instead.
IMO,
TSU