The manual mentions a recycle garbage can, where can I find it ?
And can I retrieve documents from there ?
Usually in the desktop.
It is OS dependant; not a LibreOffice feature.
Not to sure to understand how this question is related LO in genral, Writer in particular.
Trash can or recycle can is usually a function managed by the OS (operating system).
If you intend to receive help (related to LibreOffice, I insist upon this), edit your question to describe what you want to do and what you did which resulted in failure.
I thought the LO program also had a built-in garbage bin, but that’s not so, Okay, thank you for the quick reply.
I think that I get it!
Always create backup copy (in menu
Backups path is set in menu
Paths. Here will remain only the penultimate version of your saved documents.