An after-save autolaunched flow is a type of flow that runs in the background when a record is saved and performs actions based on the record data or changes. An after-save autolaunched flow does not require user input or interaction and can be triggered by a record-triggered flow element or by an Apex trigger. In this case, you can create an after-save autolaunched flow that runs when a Project record is created and creates a standard set of related Project Milestone records based on predefined values or variables. References:
https://help.salesforce.com/s/articleView?id=sf.flow_trigger_types.htm&type=5 https://help.sales