Do activity function calls in the Suborchrestor function count towards the MaxOrchestrationActions in the main orchestrator function?

Question

I have a durable function that calls two suborchestrator functions and those in turn, call 2 activity functions each

Durable Orchestrator function()

• SubOrchestrator A()
  • Activity function call A1()
  • Activity function call A2()
• SubOrchestrator B()
  • Activity function call B1()
  • Activity function call B2()

Do the activity function calls under the suborchestration functions count towards the orchestrationActions?
That is, does this count as 6 actions (2 calls to suborchestration + 4 activity function calls) or just 2 (suborchestration calls)