My dishwasher fills with water but want agitate the water.thank you

my dishwasher fills with water but want agitate the water.thank you
I have a guestion since I am not familiar with your model, does it have an arm on top and bottom that spins? Some of the lesser expensive dishwashers have only an arm on the bottom that turns to agitate the water. I would ck to see if whatever kind of device in the center of the arm or arms has possible become loose and the motor can't grab the arm to turn it.

Most dishwashers Ive seen, both residential and commercial use water to rotate the wash arm. As the water sprays through the wash arm, it causes it to rotate, similar to the way one of those rotating sprinkler heads work.

Try to turn the wash arm by hand while its off, it should turn freely, if it does not, or it snags in any way, dissasemble of the wash arm may be needed to find the cause.
If it does move freely, you may not be pumping enough water through the wash arm to mae it spin. I have seen pieces of garbage clog pump lines and cause poor wash arm performance.