Unlike evolution, abiogenesis has never been demonstrated in a Petri dish. Same for the Big Bang. In my understanding, some theists believe God "instantiated" a universe with certain parameters which we perceive as physical constants, that naturally led to hydrogen transforming itself into consciousness after 13.7 billion years. If God is all-knowing and all-powerful, he did it on purpose fully knowing how it will develop. So physics, geology, biology, etc. are all true and also the Genesis creation myth is kinda true (they believe genesis is a metaphor for people lacking the education to understand the full story).