How do silver saints and bronze saints determine that they have the same guardian constellation as the holy garments? Is it related to the birthday?

It is said that the Golden Sacred Garments is to select qualified candidates, and then the Sacred Garments choose their owners.

Silver and copper are not so strong, but there are competitions and other ways to choose the final winner and give it to the holy garments.

But the people who finally win are basically people of this constellation, guarded by this constellation, and finally win the holy garments.

If you are not the chosen one in this constellation, you will not get the holy garments for various reasons.