Up2Stream HD DAC - no sleep nor standby mode ?

Good morning,
I’ve just received my Up2Stream HD board.
Connected via Ethernet, first test results are promising…
One missing function:
I cannot find ‘sleep’ timer in 4Stream app… the manual shows the place where it should be, but it’s not present in my app.
Also, I cannot turn board off (stand-by mode) by any local key combination (key button board).

In HD DAC the manual there’s no such button listed (instead there’s MUTE button)- it’s different from other Arylic boards where it’s indicated as POWER button.

I don’t have remote to check if it’s possible to turn on/off from remote.

Does the HD DAC board support sleep timer and possibility to turn it on/off (to/from standby mode)?