Yeah there are schematics from framework, I don't think they are full though. But last thing I heard was from a while ago, so they may be more complete nowadays.
as I said, you can buy a Fairphone that isn't degoogled, the degoogled version is an option is not mandatory. If you have those requirments but still want to use a Fairphone, you can buy one that fullfills them.
I haven't actually done it yet, it's the plan for my next phone.
I should have written "I'm going to go with"