Some people see the gods as their own entity, others prefer to see them as manifestations, faces, or “aspects” of one universal being. Some people see all gods as one God and all goddesses as one Goddess, some see them not as beings but archetypes.
Paganism encompasses a huge variety of practices and literal belief in myth is not very common. Some deities are based on myths and legends, and others may be based on real historical people.
There are many ways to look at this topic but it’s super interesting. Megan just shared a video on different types of polytheism.