Manjaro doesn't use my graphics card

[omano]

Applications not using my GPU

Install the Hybrid Prime driver (seems to be done), and run your applications with the prime-run command to use the dedicated GPU for the application, so in theory, fictional example: prime-run minecraft

//EDIT:

@Krzug

steam

In the game Properties on Steam (right click the game, then click Properties…), modify the Launch Options literally to this:

prime-run %command%