Enable CSV Import from mobile

The action to Import CSV files is a powerful time-saving tool and we can use it from a desktop/laptop browser. But the feature is not active on mobile. You can see the icon appear here, but it does not open a window to select files.

I would like to enable users to upload CSV files from any device. Everyone in our business uses AppSheet on-the-go, so this is probably the biggest barrier to others taking advantage of this. Would this be relatively easy to implement, seeing as much of the action functionality already exists?