Regarding SNMP templates, the documentation page
https://www.zabbix.com/documentation/7.0/en/manual/config/macros/lld_macros
states the usage of the macro:

{#SNMPVALUE}

This method is very general, universal and functional, but in real life, an OID deserves a name closer to its meaning.

For the official template "Check Point Next Generation Firewall by SNMP" Kindly substitute SNMPVALUE (per 1.3.6.1.4.1.2620.500.9000.1.2) with a more relevant name, such as SENSOR.NAME

The item prototype in the template is already configured to use SENSOR.NAME. Right now, the discovery "Temperature discovery" is not functional.