Trust
What cannot be measured on a Wiegand reader?
Tamper reporting and sending commands to the reader do not exist on Wiegand; the product shows those rows with a grey not measured badge.
Detail
Wiegand is a one-way, unencrypted line: only the card number and the moment of reading travel.
Showing an unmeasurable row in green would be selling an assurance that does not exist.
Source
Source: the protocol table on the compatibility page.