What If Mammals of theorder Astrapotheria and Pyrotheria of South America Had Survived the Miocene and Oligocene?

If the mammals of the Order Astrapotheria and Pyrotheria had survived past the Miocene and Oligocene respectively, it would have shifted the evolutionary narrative of South America significantly. Astrapotheria: Astrapotherium was a prehistoric mammal resembling a cross between a tapir and an elephant. Suppose these unique animals survived past the Miocene, with temperatures gradually cooling from the hot, tropical climate. To adapt, these animals might have developed a thicker hide or fur to withstand cooler climates. Their size could have also decreased in response to the less abundant food supply, following Bergmann's rule, which states that the body size of a species increases with colder climate. Alternatively, they could have migrated towards the equator, where the climate remained warmer. Pyrotheria: Pyrotheres like Pyrotherium were elephant-like creatures, similar in size to modern rhinoceroses. If these large herbivorous animals survived past the Oligocene, the South American landscape would have had to support these massive mammals. Perhaps in this scenario, the Andean uplift caused by tectonic activities in the Oligocene created new biomes and diversified plant life, which allowed them to survive. Pyrotherium could have further increased in size due to the available resources, becoming the dominant herbivores in the ecosystem. Currently, in this alternate scenario, Astrapotherium and Pyrotherium could be integral parts of South America's biodiversity, much like elephants in Africa or Asia. Depending on their developed traits and size over time, they could either be forest dwellers or roam the vast grasslands. They might also have played a critical role in the dispersion of plant seeds, much like their present-day counterparts, the elephants. Human interaction would have become a significant factor in their continued existence. They might have faced the threat of hunting due to their large size and potential value, or habitat destruction due to human activities. Conservation efforts would need to protect these ancient creatures, trying to strike a balance between human expansion and preserving the ancient animals of South America. They would also definitely draw interest from the scientific community, boosting research on evolution while being touristic attractions for their rare, exotic nature.