Multi Level Running Headers with Numbering
Add the ability to have multiple running headers. Specifically for multi-level lists that include numbering. Currently you can only select one paragraph style and it doesn't include numbering. It would be great to be able to create breadcrumbs for multi-level lists so you can show which section and subsection you're in INCLUDING NUMBERING. Currently the running header drops the numbering which is annoying.

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Viacheslav Horobchenko commented
If you are using the Windows platform. I am working on a script that allows you to automatically build multi-line headers and footers with numbering. Text variables for Running Headers can contain text with numbering, as well as paragraph numbering only (when you want to show a range of numbers without text)
At the moment, the script has been tested with four customers and at my place of work (InDesign 2020). If you are interested, I can provide the current version of the script and instructions.
There may be some malfunctions due to different operating systems (versions of Windows), but in general everyone is happy. Unfortunately, the script has not been tested on Mac yet.