Online Sharing/Editing like Google Docs?

If you mean “share a single project concurrently”, then no, there isn’t. Here is a post that discusses a few methods for how to safely share a project. It’s from 2017, but still valid.
[url]Sharing a project with a co-author]

This request comes up every now and then. Below are posts from 2017 and 2018, where L&L provided a consistent response: “There are no plans for a web-based version of Scrivener at this time.”

[url]Collaborating With Scrivener]

[url]Web Based Version]

I’ve heard nothing from L&L since then to make me believe they’ve changed their minds.

Best,
Jim