Do sub-events export from Caterease to Nowsta?

Yes however the integration sends sub-events to Nowsta as individual events.
If a Wedding event (event id = E3) has two sub-events, it will transfer into Nowsta as Wedding (E3 - S1) and Wedding (E3 - S2) respectively.
The reason for this setup is sub-events can have different venue locations and start times, so it is not possible to create one central event in Nowsta that lists each of these differences to specific employees. You can choose to hide sub events in Caterease before exporting.

See I see events in Nowsta but I don’t see them in Caterease for more details on how sub-event transferring works.