Is this switch an active high or an active low spdt switch?
This switch is neither Active High or Active Low.
It is a mechanical SPDT (Single Pole Double Throw) switch, with a function of On-Mom (On- Momentary)
That means this switch has 3 contacts, is spring activated, one common terminal, one that is Normally Closed when the switch isn’t depressed and one that is Momentary Activated when the switch is pressed.