As you can see, there is no option for "online only" here. I have gone into "preferences" and enabled smart sync (which required going into system preferences to give it permission). That's all squared away. I also added the option to automatically make folders online only when they're out of use for awhile (apparently like two months?) - That didn't change anything. And I'm trying it on a folder that has the icon which means it's both local and online...internet is working just fine it seems. After some processes finish, I will look into reinstalling the desktop app / the basics, but would love to still get an answer.
I've checked the help documentation on the website and searched quite a few previous discussion posts. This feature is the most important feature of dropbox for me. I hope we can get it working!
Thanks,
Chase

MacBook Pro (15-inch, 2018) // 10.15.6