When using Tools > Scenarios, they are displayed in the order they were created in. Both in the Navigator and the drop down menu next to the Scenario shells. This order can't be changed. It really should. I would think being able to reorder any list on a computer to be one of the most basic features, in any software.
This missing function could be solved with an improved Navigator. The proposal is here https://design.blog.documentfoundation.org/2016/07/31/how-the-navigator-may-support-object-handling-in-libreoffice-draw/