Step 1: Create Facebook audiences using existing (old) pixel / Dataset data.
Follow these steps to do the same
Go to Facebook audiences > Create audiences
Then click on Custom audiences > Website > Choose source as the respective pixel ID
Create audiences for all events separately
Select retention days as 180 > Name the audience using Adyogi nomenclature used for the account > Create audience > Done
Note: Create audiences for all Events Page View, View Content, Add to Cart, Initiate Checkout, Purchase, Video watched, time spent separately one by one
Step 2: Now that the audience for each event is created, select the audiences and click on share. Enter a new Ad account ID where you would like to share these audiences
Attaching screen recording of the entire process here - https://www.loom.com/share/e5603af007a94e3683298e6f44c0c254