I am pretty sure that was the case (unparked and tracking on). I could slew manually, clicking [next], plate solving worked and then [next] again. This would not have worked, if the mount would have been in "park" and "still" mode.
Check that the slew "Speed:" button, in the PAA window, next to the "Direction:" button, is set to "Max" and not a slower speed. My M-Uno PAA speed was set to "Guide" and I thought that the mount was not slewing but it was, at a painfully slow speed. Changing it to "Max" solved the problem.
Indeed, the StarGo2 is primarily foreseen for the M-due. I asked Avalon to have it adapted to the M-uno, since they also offer it as a stand-alone controller. Avalon kindly pre-installed the StarGo2 with a new adapter plate to the motor boxes (= fork arm). I did not even get the classical StarGo controller. It works nicely.
The configuration works well with a separate computer and an INDI interface. With KStars & EKOS it works mostly OK, except for the PAA . I did some changes in the settings and I will try again hopefully later this week, when I have a clear night again. BTW, SkySafari works very well, which I like using very much.
I also try to access the SG2 with the ASIAIR Pro... Does not work well yet. I will keep trying different drivers, settings, configurations etc. I have to admit, I am feeling pretty spoiled by the ASIAIR app on an iPad. I wish there would be something similar for a less proprietary environment and set of equipment.