Automated testing tools for mobile Chat application

I've searched google upside-down, can't find a single example of a tool that can test Android and iOS "concurrently"

The quotation marks are there because the idea is to test a story, i.e. e2e, of a scenario like this (not a simple test the same time on multiple devices): (really simple, not even close to a full test but shows the point) 1) Android user sends a message to a specific iOS user 2) iOS user opens the application and waits for incoming messages from the specific user. 3) when the message arrives, iOS user send a message back

This simple test scenario validates that sending messages between 2 platform works, e2e.

Is there any tool(s) that can help me achieve this?

Currently, testing this scenario with multiple devices of any platform is done manually.