SNMP traps for custom alerts in Aria Operations for Networks / VCF Operations for Networks may have dynamic fields (that tend to change). These type of fields may not be visible in the SNMP trap sent to an NMS.
VCF Operations for Networks
This is as per design. This KB is only for informational purposes.
Example:
Following custom alert shows dynamic fields like "Upper Bound" and "Lower Bound" which are missing from the trap info on the NMS: