Geological and paleontological evidence confirms that the earliest land plants drove a major rise in atmospheric oxygen during the early Paleozoic, which closely coincided with the earliest appearance of wildfires in the fossil record.
Multiple papers (e.g., Lenton et al., 2016; Scott & Glasspool, 2006; Wallace et al., 2023) consistently show that as terrestrial plants colonized the land and atmospheric oxygen rose to the threshold required for combustion, charcoal (wildfire evidence) began appearing in the fossil record during the Late Silurian/Early Devonian. There is no evidence refuting this sequence.