I only have a handful of Scenes but all those without restricted devices show in the Google Home app. However only under Account Icon > Assistant Settings > Name of home. They are shown in a room but when you look in the room settings they are not there. They do not appear elsewhere in the app.
I have to say that the Google Home would be FUBARed without any help from SmartThings and every time it updates they change things around and you have to guess what they’ve done this time.
SmartThings scenes and Google are particularly odd though.