You can use an address object of type IP Wildcard Mask only in a Security policy rule.
https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-web-interface-help/objects/objects-addresses IP Wildcard Mask
-Enter an IP wildcard address in the format of an IPv4 address followed by a slash and a mask (which must begin with a zero); for example, 10.182.1.1/0.127.248.0. In the wildcard mask, a zero (0) bit indicates that the bit being compared must match the bit in the IP address that is covered by the 0. A one (1) bit in the mask is a wildcard bit, meaning the bit being compared need not match the bit in the IP address that is covered by the 1. Convert the IP address and the wildcard mask to binary. To illustrate the matching: on binary snippet 0011, a wildcard mask of 1010 results in four matches (0001, 0011, 1001, and 1011).

https://docs.paloaltonetworks.com/panorama/9-0/panorama-admin/manage-firewalls/manage-device-groups/create-objects-for-use-in-shared-or-device-group-policy

Explanation/Reference: https://docs.paloaltonetworks.com/content/dam/techdocs/en_US/pdf/framemaker/pan-os/7-1/pan- os-admin.pdf page 144