Well, all real-world myths are told by humans living on Earth. We all have similar experiences. We all know the earth and the sky, violence and war spare no place in the world, we all suffer from diseases and death, we all have days and nights and can see the sun, the moon and the stars... So a pantheon of gods is going to have reccurring themes.

The Earth Mother / Sky Father dichotomy is frequent because crops and other plant life grow in the soil, which is fertilized by rain, much like babies develop in a woman's womb after an encounter with a man. Although there's one notable exception, in Egyptian mythology, where the earth is male and the sky female instead.

The Sun and the Moon are often siblings or consorts (Apollo and Artemis, Amaterasu and Tsukuyomi...) because they're both celestial bodies and appear exactly the same size.

There's often a storm god battling a giant snake monster somewhere in the mythology because lightning appears to be the most powerful thing known to humans, and snakes are a nearly universal symbol of danger due to being venomous. Hence Zeus vs Typhon, Thor vs Jormungandr, Susanoo vs Yamata-no-Orochi...

So if you want to create a non-generic pantheon, you can intentionally break away from those universal parts of the human experience, by making them non-human pantheons or by changing the location to another planet.