Hi FalconMan,
Thanks for reaching out here in the Community. We understand that having such an option will let you set your desired sound for notification; however, we don't have any news to share about applying this feature to the Nest app or Google Home app. We're always looking for ways to improve and we'll take it as feedback. I'd suggest you send yours with our Send Feedback form to let the Google Engineering team know about your concern. While they won't respond directly back to you, this is the best way to let them know about this. Let us know if you have more questions in mind.
Regards,
Emerson
