Sure. The version of LibreOffice online that people know, is now developed from another spot: https://collaboraonline.github.io/ So all hackers welcome there scratch their itch ;)

Talking about a demo: Collabora offers free demo's and CODE, to be found (from) here https://www.collaboraoffice.com/collabora-online/

I was wondering the same thing and under "Is it ready yet?" it states:

> Yes for sure. LibreOffice Online is here and still growing in feature-richness.

Yet there is no link here nor further in the document.