Not yet, but you should be able to drag-and-drop the data on your disk into Ente's desktop app[1].

Please note that if you're primarily using SmugMug to store RAW files, their support (in terms of previewing capabilities) is limited right now. It's on our roadmap, and we will prioritize it, but just wanted to give you a heads up.

[1]: https://ente.io/download/desktop