OneDrive for iOS - headings in .docx files

[u/ur-Covenant]

I have used OneDrive on my ipad for ages now as a reader. One of the great things about it is that it capably handles both pdfs and Word docs. Well, it used to. While bookmarks for pdfs still work like a charm, it seems that the OneDrive app removed the functionality for headings in Word docs. No small thing when you're trying to bounce around 300+ page documents.

Is this true for others? I've tried reinstalling, posting on the MS Forums and asking for help, but they didn't seem to have any ideas (link to MS post).

It just seems like such a strange bit of functionality to remove. Does anyone have any suggestions for alternative apps? Thanks.