Dreamsiren
I just set up a private space and I'm trying to get apps installed in this space to show up on μLauncher, but no matter what I try I can't get any to show up.
"Hide apps in private space" is disabled, there's no lock icon on the upper right, private space apps show up and run just fine on the default GOS launcher, not sure what else to do,
I guess with "Hide apps in private space" you're referring to Settings> Security & privacy> Private Space> Hide private space, right?
There is another setting which would explain the launcher's behavior you're describing:
Go to μLauncher settings (gear wheel top left) > Launcher. Make sure that Hide private space from app listis toggled of.