Does it mean that only after the happening of those events upanishads are written. If yes how the Vedhas can be said as “Anadhi”

Vedas are said to be “Anadhis”. And Vedhas include the Upanishad part also. But Upanishads tells so many stories which are a real occurrences. Does it mean that only after the happening of those events upanishads are written. If yes how the Vedhas can be said as “Anadhi”

VEDAS ARE BEGINNING-LESS ( ANA:DI) ONLY. UPANISHADS ALSO BECOME A PART OF VE:DA ONLY. THE STORIES WE USUALLY HEAR IN THEM, WILL BE REPEATED IN EVERY MANVANTHARAM AND IN EVERY CREATION. THE ONLY DIFFERENCE IS
EVENTS MAY CHANGE. PEOPLE IN THOSE POSTS WOULD BE THE SAME. VASISHTTA, VYA:SA, PARA:SARA ETC, ARE ACTUALLY THE POSTS IN WHICH SOME BLESSES SOULS TAKE BODIES AND DO SOME SERVICE TO THE LITERATURE FOR FUTURE GENERTIONS TO KNOW.

=chinnajeeyar=