How do I know to ensure that the wheel reaches this speed after issuing a speed command

I control my robot through a differential controller, but its running speed cannot reach the speed I want. I have considered the issues of wheel friction and collision volume.
Currently, I use a differential controller through the action graph of isaac sim, but it is an open-loop controller, so how do I know to ensure that the wheel reaches this speed after issuing a speed command.

Is there a trip meter or other way to get the speed of my wheels and adjust it?