adding here some info from our dev-rel team:
Actually, there's already an uninstall survey, but it pops for users once they uninstall the Overwolf client, with or without app or apps installed.
This means we get a mix of responses for the reason of uninstalling. If you'd like, you can ask your DevRel manager to share the results relevant to your app.
Besides, we're planning to research a feature to allow a dedicated uninstall survey per app, but currently, it's not queued.
And I’m adding - that as mentioned, we will discuss it internally and let you know.