UDT and Palo Alto Firewalls

I have a number of PA FWs that we use.  Many devices like IoT devices have VLANs that terminate on the FW.  I have the polling integration setup.  I cannot search a device via the IP address.

Support said the following two MIBs on my FW say are unsupported.

ipNetToMediaTable = 1.3.6.1.2.1.4.22

ipNetToPhysicalTable = 1.3.6.1.2.1.4.35

This is needed to read the ARP data.

Questions.

1. Why is SW using SNMP to read data for SNMP when the integration is supposed to get UDT info?

2. Any other SW and PA customers able to search for device on FW via the IP address?

Thanks.