How to show pre-filtered list on a search results area

I am working an iOS app that manage employees requests, I have a screen that shows requests, and a search field above it, I can search within my requests. but, I can also send a push notification with a batch of requests, all from the same day and type.

Is there a method, preferably something that is recommended by apple or at least google, to communicate where the this list came from?

P.S. We don't have information of the common that these requests have, such as their type or date, we can only tell the user that they all came from the same notification batch..