It is possible, dont know why it is not visible on topbar in visual studio(got only pcl project, android, ios and uwp - missing watchOS).
Had to right click the project and click 'set as startup project'.
Anyway copying to watch take forever(like 5 minutes), and application has only one button and label
Didnt manage to start debugger because it also takes a lot of time
Answers
It is possible, dont know why it is not visible on topbar in visual studio(got only pcl project, android, ios and uwp - missing watchOS).

Had to right click the project and click 'set as startup project'.
Anyway copying to watch take forever(like 5 minutes), and application has only one button and label
Didnt manage to start debugger because it also takes a lot of time