Sleep mode firestick 4k

Is there an apk that will turn off the Firestick 4K sleep mode?
I have the screen saver setting set to never.
I also tried a few different adb shell commands with no joy.
It is still set to 20 minutes.

Firestick 4K

Didn’t we go through the adb shell command last week?
settings put secure sleep_timeout 0