There are times when we need to do parallel approvals on the same record, but this isn't supported within Flow Designer. The typical pattern instead is to create a subtask and create approvals on the subtask.
To do this:
- Add Do the following in Parallel Flow Logic
- Create a subtask, but adding Create Task to each branch (Create Catalog Task for Service Catalog flows)
- Be sure the Wait Checkbox is unchecked
- Add Ask For Approval to each branch and use the Task record created in (2) as the record for approval
- You may want some logic to close the subtasks once approved
Also, refer to this thread :