Same but on a Pixel 6a. It's good for the most part. I don't use this phone for calls/sms so I wish I could just disable that while retaining mobile data, but I haven't figured that out yet really.
I read you can delete any stock apps like Phone and SMS Messaging by connecting your phone to a computer and using adb (does not require root). I haven't tried it but you can search online about using adb.
I installed it the way the guide on GrapheneOS site explained.