Cloud Armor - jsonPayload.enforcedSecurityPolicy.matchedFieldValue length

[Mapm]

Hello.

I'd like to ask about a problem that occurred while trying to control the cloud armor.

Among the logs in cloud armor, I think the only thing that can see the data in the attack payload is jsonPayload.enforcedSecurityPolicy.matchedFieldValue. (required for attack analysis)

Is there a way to lift the restrictions as the corresponding value only comes up to 16 bytes?

Thank you.