Is it possible to update an obb file?

For my use case, the app will be split into an apk and an obb file, with the obb file containing most of the 3D models that will be used in the app. Some of the 3D models may have to be updated over time. Is it possible to update the obb file? A ‘sync’ button on the app should trigger the activity. Only those models which have been updated on the server since the last obb update, should be downloaded. A file containing the last update time could be maintained on the app and the server. Is such a functionality possible on Unity?

A new obb file gets created every time you build the apk.