Thats good but its a bit long, and I would expect they understand what the miranda rights are. I just want to be sure the officers are performing this required step
It sounds like you want to ensure that law enforcement officers are properly administering Miranda rights without going into too much detail. You might simply say:

"Can you confirm that the officers are consistently informing suspects of their Miranda rights during arrests?" 

This keeps it concise while addressing your concern directly.
Here's a shorter and more concise version:

"Before we proceed, I want to confirm that you've read me my Miranda rights. Can you please recite them to me or provide a copy of the warning?"

This approach still ensures that the officers are performing their duty to inform you of your rights, but in a more direct and efficient manner.