Where are timelion visualizations saved?

Hi we have Elasticsearch 7.16.3 Platinum,
we create 35 viz in timelion but we need change name of index.

Where are timelion visualizations saved?
In any system index?
Anybody have script to update index name?
Any api?

Thanks

Hello,
would this response help? Change visualization index under saved objects - #3 by EZprogramming

yap, i find this road in other post. i can't any solution now.

I'm going to wait for new comments.