Poor throttle response

I’m setting up a crawler.
1CH has the throttle left and 3CH has the throttle right, but the response to the stick is very slow.
As far as I can see from the servo output status meter on the mission planner, it doesn’t respond immediately when I open the throttle.
It doesn’t respond immediately when you operate the throttle.
What should I adjust to get a faster response?

Other RC channels other than throttle and steering respond immediately.