I'm trying to install some Krita plugins and they are Python based. My Krita version is 5.1.3 (this is newer than the minimal 5.0 for python plugins) and I have Python3 installed already.
The menu option Tools->Scripts is empty, there should be at-least a "Import Python Plugin" option.
Also the Setting->Configure Krita...->Python Plugin Manager is empty, there should be some plugins by default.