Is this the appropriate place to report such an issue?
Possibly the developer needs to check the Android box during upload of a future version.
I suggested as much to the dev.
The response was somewhat vague, as I recall.
Is the interface for selecting supported platforms something that the dev has to look for when uploading, or is it very straight forward?
This is a screenshot from the page you upload a new version on:
So yes, very straight forward.