What is creationism like in the religions of your world?
In Transformatsiya, they believe that God created the universe in six days 60,000 years ago at the beginning of the Holocene. Everyone was created with memories of existing before the moment of creation.
They don't believe that evidence of an older universe is "fake." Instead they believe that it's "in context" and scientists should study the universe as it appears and any evidence of existence before creation is simply part of God's work.
They believe in evolution since the moment of creation. Saying things like "Dinosaurs didn't exist" is breaking the fourth wall.
Quite easy. In my world, the world was created by The Creator. People might not have gotten each detail right - a lot of deities claimed they created the world, not a Creator - but they are right being creationists, and their view is considered normal and correct.
Things like evolution and mutations have not been recognized as a thing, so that is not a question, either.
Oh, and no one has found any dinosaur bones yet. Or extreme old fossils. They simply don't exist.