ADB Accessibility Focus Change

I would like to know how to make the ADB adjust the accessibility focus while Talkback is on. I have tried:

adb shell input trackball roll 0 1
adb shell input [stylusdpad|keyboard|mouse|touchpad|gamepad|touchnavigation|joystick|touchscreen|stylus|trackball] swipe 180 780 540 780
adb shell input keyboard keyevent KEYCODE_TAB
adb shell input keyevent KEYCODE_NAVIGATE_NEXT
adb shell "input keyevent KEYCODE_ALT_LEFT & input keyevent KEYCODE_DPAD_LEFT"

I have also tried recording events using adb shell getevent and playing them back without success.

But I always have to physically swipe the screen (i.e. an ADB swipe does not work) to get the accessibility focus to change. Is there a way to do this with accessibility, just a next and previous movement?

I have found this article by Google:

Navigation

• Move to next item: Alt + Right arrow Note: In continuous reading mode, this shortcut fast-forwards through the text.
• Move to previous item: Alt + Left arrow Note: In continuous reading mode, this shortcut rewinds the text.

Which means I just need to send multiple key presses at once, right? I tried this, based on another SO answer:

device="/dev/input/event3"
ALT_KEY=57#18 #KEYCODE_ALT_LEFT
LEFT_KEY=21#37 #KEYCODE_DPAD_RIGHT
RIGHT_KEY=22#39 #KEYCODE_DPAD_RIGHT

device="/dev/input/event0"
adb shell "sendevent $device 1 $ALT_KEY 1 & sendevent $device 0 0 0 & sendevent $device 1 $RIGHT_KEY 1 & sendevent $device 0 0 0"
device="/dev/input/event1"
adb shell "sendevent $device 1 $ALT_KEY 1 & sendevent $device 0 0 0 & sendevent $device 1 $RIGHT_KEY 1 & sendevent $device 0 0 0"
device="/dev/input/event2"
adb shell "sendevent $device 1 $ALT_KEY 1 & sendevent $device 0 0 0 & sendevent $device 1 $RIGHT_KEY 1 & sendevent $device 0 0 0"
device="/dev/input/event3"
adb shell "sendevent $device 1 $ALT_KEY 1 & sendevent $device 0 0 0 & sendevent $device 1 $RIGHT_KEY 1 & sendevent $device 0 0 0"

device="/dev/input/event0"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 0 0 0 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event1"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 0 0 0 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event2"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 0 0 0 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event3"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 0 0 0 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"

device="/dev/input/event0"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event1"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event2"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"
device="/dev/input/event3"
adb shell "sendevent $device 1 $ALT_KEY 1 && sendevent $device 1 $RIGHT_KEY 1 && sendevent $device 0 0 0"

(even though I know device0 is actually the keyboard device, I wanted to try them all)

from ADB Accessibility Focus Change