Is it possible to send data (display) to an element in a repeating group?

Is it possible to send data (display) to an element in a repeating group?
Or are there any alternatives?

What’s the use case?…

Let’s say there is a driver and a rider.

Riders are looking for drivers

Drivers request riders

When drivers request, a [ new "request " - in a popup ] is made
In order to cancel the request, I need to be able to send data to the group in which the cancel button is… As far as I know…
So how do I send data from popup to repeating group? Is it possible?