Cannot Make Files Online-Only On Mac

I am essentially out of space on my computer despite having plenty available in the cloud, and the hundreds of gB's I'm using are taking up space on both my dropbox and my computer itself. When I right-click the file within Finder, there is no option to "make online-only". I have already turned this feature on as well as enabled the extension from the dropbox website. I have also already authorized all the necessary permissions within the macOS settings themselves regarding Finder extensions. Despite this, and multiple restarts amidst days of troubleshooting, I am at an impasse as my workload is backing up and so before I am brutally forced to switch to Google Drive for the foreseeable future, I figured I would try and solve these issues here first. I am on MacOS 10.15.1 (Catalina), and so this is my first culprit. I would love to avoid updating for the time being, although I'm aware this may be the problem. Any advice would be vastly appreciated. Thanks!