I had opened multiple Writer documents and a Calc document when LibreOffice crashed. As I had auto-save enabled, LibreOffice offered to recover all the documents when restarting it.
However after recovery had finished the first (writer) document has stats like "not yet recovered" while the rest has the check mark (recovered successfully) set.
At that point there was no way to retry recovery or so, so I continued.

The first document showed yesterday's (time of last save) contents, and multiple hours of editing seemed gone!
So I closed the document and re-opened it, hoping recovery would be suggested (that's what Emacs would do BTW). But the document opened without further notice, showing yesterday's content.

Fortunately (in this context only) LibreOffice crashed again while working on the Calc document, and (rather) surprisingly LibreOffice suggested to recover the document that wasn't recovered before. This time it succeeded, and only little of today's work was lost.

It seems that auto-recovery is not as reliable as it should be, and there should be an option to re-try the recovery if is shows a "not yet completed" at the end of automatic recovery.

Version: 7.6.4.1 (x86) / LibreOffice Community
Build ID: e19e193f88cd6c0525a17fb7a176ed8e6a3e2aa1
CPU threads: 8; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: de-DE
Calc: CL threaded