I don't think anyone can guarantee such functionality.

In principle, switching by definition (which also includes unplugging up to 16Amp) is possible at any time without causing hardware damage (unless otherwise indicated by the manufacturer).
According to applicable standards....
But....
Since electronics have degenerated into a disposable mass product, they count on compact design. Or simply the ravages of time that gnaw away at certain electronic components. The fact is that possible voltage peaks can occur when switching on and off. So compact and (cheaply) built, it may well be that switching them on again will destroy them.

With a Unifi switch with a separate power supply unit, it is less critical because the power supply unit absorbs these voltage peaks.

Nevertheless, I would advise against this switching on and off game, hot or not.

To counteract this effect, I recommend mounting the switch on an aluminium perforated plate for TV amplifiers.
This way, the swich is also cooled from below and the aluminium dissipates the heat better.

When it comes to switching off the WLAN overnight, this can be configured directly on the APs via the Unifi Controller software.