Enabling the accessibility mode

I recently purchased an iPhone 11. I want to enable the accessibility mode. I was able to go to settings and do that however, I can not click and drag. I use the joystick from my powerchair in Bluetooth mode to move the circle/ curser from my power wheelchair. It’s does it allow me to drag and click to go to the next page. I was able to only go to an app from the presented screen and click that. When I asked my parents to use the touch screen to drag for me since I could not using my joystick, the screen froze and the touch on the screen did it work. I had to let the battery drain. I am hoping that you can help me with this matter.