Hi @JADAstudio
It's Kelsey again - I think I worked with you recently on another post. Happy to help on this one, too!
While within BIM 360 Team, you could send a direct link to the model for anyone to preview, without a sign in requirement, this is not currently a feature in BIM 360 Doc Management.
You could try Autodesk Viewer website for free to upload your model and then send that share link to the appropriate people. Those you send the link to will not need to sign up. See: https://viewer.autodesk.com/
Also, for those looking to review your Revit model that do not have Revit, they could download the free trial of Revit to view your model. Even after the 30 days, the viewer still works. Of course, this would mean using a share method of your choice to send them a local copy of your model.
I found this this idea that relates to your post. You may like to review it (and possibly vote it up). Autodesk’s REVIT IDEAS page is where customers provide suggestions for new features and enhancements, then other Revit users vote on it, and the Revit product managers and engineers pull from these ideas for further Revit development.
If my reply was helpful, please ''Like'' or click the ''Accept as Solution” button below (or both).

Kelsey Skaug
Autodesk Technical Support