Set default power on state for "Classic A60 W clear - LIGHTIFY"

Edit: had a look according to PowerOn settings for Lights - #4 by Smanar at the attributes in cluster 0x0006:

It seems like 0x4003 is performed.

Can you interpret these for me?

I fear the device does not allow to change these (not writable)… right?

What is “8001 Tuya special” (0x8002)?

Any hack (flashing the firmware or another cool deCONZ tweak) to force the light to change its behavior (prefered “last state”, even “off” is better than “on”)?