Thanks for reaching out and posting here in the community. As of now Nest Protect can't be installed to the Google Home app and it can't be connected to a 5GHz Wifi network.
I would suggest that you send feedback by following this link. Let me know if you have other questions or concerns, otherwise I’ll be locking this thread after 24 hours.
While I can't speak to the reasons why certain features might be included or removed from a product line, I can reassure you that your voice is heard when you submit feedback and we pass your comments along as a feature request. We have made sure our teams have seen your request and comments, and they are always taken into account on future hardware and software updates. Aside from the feedback, is there any other way I can help?
Rest assured that we'll take note of it — we'll ensure that we'll learn from your experience as we continually improve our products and services.
As Community Specialists, we occasionally do a bit of housekeeping to keep the conversations in our community fresh and relevant. You can create a new thread if you have another question in mind, we're always here for you.
Thanks for the help, Emerson.