problems and questions with focus 14 braille display

Braille on Apple Products

I aquired a focus 14 blue a while ago and it rocks.
The problems I have are:
First, I cannot do something like on the keyboard that lets me move between containers. Is there such a command.
Second, often my braille display has a tendensy to make a sound and then jump. Is there a solution for that?
Also, is there a quicker way to do things like on a keyboard where I can search for an app by typing? I am running iOs 12.4 and have an iPhone SE.