Automatic collision resolution when using multiple extruders?

Just got my first multicolor printer (Snapmaker U1). Now I’m trying to create a multicolor print. HOWEVER, the model I’m trying to print contains overlapping objects. Orca warns me of a collision, and the slicer seems to not be smart enough to avoid printing twice in the same place. Tried the same thing with PrusaSlicer, which figured it out on its own and produced viable GCODE without my having to do anything special. Does Orca not have this ability, or do I have to do something to tell it to make things right?

Merge into a single object or combination, rather than existing as separate entities.