Hi
What plan sequence do you want to export in the excel?
To my knowledge, you can export the data in the excel and sort your Excel data on one columns or multiple columns, so you don’t need to worry the sequence of task in the Excel. For more details about how to interact your plan data, you can learn from:
https://support.microsoft.com/en-us/office/export-a-plan-to-excel-4d850c6e-e548-4aab-83b4-b62b68662d2a#:~:text=If%20you%20want%20to%20sort,choose%20either%20Open%20or%20Save.