Actually I thought about it after posting, I’m not sure how Tiktok does it. This would automate a scroll to next item, not so much a ‘constant’ animation if that’s what you were looking for.
Btw the above example was based on a 1x1 RG. If you have multiple columns in your RG, you can have two states start and end states and change both every X seconds.
The RG’s data source would then look like List’s fields:from item #start :until item #end