Switching character number for footnote/endnote (CTL)

I need to change Arabic numbers, used to indicate footnotes and endnotes, to Devanagari numbers. I can make this change using Tools/footnotesandendnotes and the menus. I change both the list of numbers, from 1,2,3. . . to १,२,३. . and I change the first number from 1 to १. When I save changes and leave the document, however, the footnote/endnote numbers revert to Arabic. How do I keep them in Devanagari?

Works for me (Complext text layout enabled):
Version: 7.6.2.1 (X86_64) / LibreOffice Community
Build ID: 60(Build:1)
CPU threads: 1; OS: Linux 5.14; UI render: default; VCL: gtk3
Locale: es-MX (en_US.UTF-8); UI: en-US
Calc: threaded

But don’t work if saved as .docx.

Thank you. I forgot to mention that the publisher I’m working with demands I send them files in .doc or .docx. And that is the problem. I can save this document just fine as .odt. The note numbers remain in Devanagari, but when I save as a Word document, then they get reverted to Arabic. Clearly, though, Libre Office is doing its job (:-).

Have you tested saving as .doc?
There is one of two bugs here that must be tested. Setting footnote numbers as Devanagari…

  1. …when saving as .docx, Writer saves them as Arabic, or
  2. …when opening a .docx, Writer convert them to Arabic.

I can’t test with Word in this PC.

There is a bug report related to this issue: 158354 – FILESAVE DOCX Footnotes lose styling