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Edit: What Docsflow does is allowing InDesign to sync with the gdocs files.

Edit 2: in the end what I need is an online collaborative text tool (cross device) that I can link to a page layout program. Right now my workflow is Google Docs + Adobe InDesign.

Edit 3: Worked around it by using adding my project files to a OneDrive folder and editing the text files through Word online.

Edit 4: I think the open source solution would be having a nextcloud server syncing the .odt files linked in Scribus, but I will have to try to be sure. Thanks all!