Old earth creationism is more or less uncomfortably accommodated in most fundamentalist circles.
Any serious view of scripture must acknowledge that metaphysics has changed since the times of creation and that factor, let alone others, makes it very difficult to project back to the creation times from a modern viewpoint. If you have done what the Scotty of Star Trek could not, then the rules go out the window. What is a 24 hour creation day? What is a multimillion year creation day? It becomes an exercise in imagination, not in science or even in hermeneutics.
There are places in the Universe we can see today with the most advanced telescopes whose single day lasts longer than one billion years here on the Earth due to the time dilation effect in physics created by the Creator.
Unfortunately, “young earth creationism” is making heavy-handed inroads. There’s a homeschooling conference coming up that we’d like to attend; oddly, exhibitors are REQUIRED to sign a declaration that they adhere to “young earth creationism”. I don’t mind if it’s taught as a valid POV/theory, but kids need know what rigorous science has concluded (right or wrong).