Thank you for the detailed post and the screenshot. I tried to be as creative as possible, the only way to achieve a descending period in a pivot table is to use fixed period but I know you’ve already thought about that since you mentioned “dynamically”.
For the most part, I’ve mostly seen these tables always display an ascending period. I’m wondering if descending periods is a default system somewhere? It’d be great if more context is provided to support a feature request.
Would you like to create a feature request for this? (See ideas, and if you create one please share the link here so other community members can show interest and follow for updates).