Inside a flow please add the ability do duplicate an action.
When you're building complex flows sometimes you have different outputs, for instance if using "condition" or "switch" actions you can have several ways the flow can go through. Imagine you need to send an email for each condition and just a small detail changes inside that email. Nowadays you need to create each email separatly, when you could just copy the first one, change it and place it inside the proper position.
Or imagine the scenario where you Save as.. as Flow and need to add previous actions from that flow. in the new copy.