How to view previews of online-only files on desktop (like how you can in the mobile app)? - macOS

I'm trying to figure out how to see previews, specifically of .jpeg online files, on my mac desktop. I use Dropbox almost exclusively for photo management and it's frustrating not even being able to see a preview so I can figure out which files I need to download locally (I just moved from an old computer that had enough storage to download everything offline to a new computer with much less storage so almost everything is online). I can do this on my android app. All of the online-only files on the mobile app are fully previewable and I can scroll through everything before deciding what to download. Is this possible on the desktop?