Reading values incoming from HC-05

Hello my main problem is I can read values incoming from my HC-05. Values are coming from my custom made arduino controller project. I want to play a game made in unreal engine 5 on my phone using the controller so I need to proccess the incoming data and for example move the car forward. How can I manipulate this data maybe? to basically tell my phone to press 'W' in game.

Show us what you've tried so far. Show how you send data from Arduino, and show the blocks that you try to receive this data.

here I am reading the incoming data from my controller and establishing the connection.