From the Jain point of view, the Big Bang theory is not accepted as the ultimate explanation of the universe.

Jain view in brief:

• The universe is अनादि (without beginning) and अनंत (without end).
• It was not created by God.
• There is no single first moment of creation.
• The universe exists through natural eternal laws involving the six substances:

• Jainism teaches cyclical time with rising and falling ages, not one creation event.

About Big Bang:

• Jainism does not deny scientific observations.
• But it does not agree that the universe began from absolute nothingness in one explosion.
• In Jain philosophy, the universe is eternal, though its forms and conditions keep changing.

Simple conclusion:

If you want, I can also explain this in terms of Jain cosmology and the structure of Loka.