Around the world, many people—perhaps the majority overall—accept a belief in reincarnation as part of their religion.
Not many people in the West believe in it, though. In fact, many scoff at the very idea and regard it as nonsense.
This is largely because in the West we are enamored with the benefits of scientific knowledge and increasingly sceptical of the old religions—rightly so, in my view. The knowledge science provides can be systematically checked to ensure that it is valid and reliable. This is why it is of such great value.
But it is not necessarily the only source of knowledge that is valid and reliable.