Most of those that consider themselves as creationists on this forum do not accept evolution. Those that claim Christianity demand that Genesis be viewed as the only explanation for life and it's diversity. There were religious people in the past that followed some aspects of what we call evolution today, but how close it was to modern understanding and how many followed it, I cannot say.
A creationist can follow it today, but in some cases that following veers from the scientific position or is highly modified. It would be strange to accept the story in Genesis and evolution at the same time. It would make no sense. But some believe that God created life and then let it evolve. Some may believe in God, but have no idea how life arose, but accept science and the theory of evolution. I suppose they are still creationists, but very limited and different from those in this forum.