In FS2020, you can control the drone camera with WASD commands to move forward, backward and side to side, and the R and F keys to ascend and descend. The numeric keypad keys 4,6,8, and 2 rotate left, right, up and down. The numpad keys 7 and 9 rotate the camera in roll. Numpad 5 resets the location.
The keyboard commands are revised in FS2024 and I don’t remember them off-hand.