Partnerspace is a built in feature, it’s already there. The app was just a way to easily apply it and assign apps, and remove them. Previously I used to install it (had its dependencies taken from Jolla phone), but it became a hassle (you have to change components of its files and scripts to reflect changes in the OS (ex:defaultuser instead of nemo) and the new location of android apps.
So I made a script instead and stoped using the app. However you can simply do this to apply an app in partnerspace:
dconf write /desktop/lipstick-jolla-home/partnerspace/applications "['/usr/share/applications/app.desktop']"
and to remove them
dconf write /desktop/lipstick-jolla-home/partnerspace/applications "['']"
to apply more than one app
dconf write /desktop/lipstick-jolla-home/partnerspace/applications "['/usr/share/applications/app1.desktop', '/usr/share/applications/app2.desktop']"