Ask HN: Why do big companies not add proper changelog for Play Store updates?

I have mostly seen this with Google and Instagram. Whenever I go to see the what's new section in the Play Store version update, I see nothing. For some apps, most of the times it just "bug fixes and stability updates", "made the app look better", etc. Back in the days, we used to get some details about the update, as in what changed. Google Maps introduces breaking changes and yet the changelog message remains the same.