Cisco SDWAN Forward Error Correction Loss correction threshold issue

[Rps-Cheers]

HI Experts.

I know  the threshold value can be between 1% and 5% packet loss. Do you know whether the Cisco SDWAN FEC Loss threshold is for line packet loss or TCP packet loss?

• FEC Adaptive—Only send Forward Error Correction (FEC) information when the system detects a packet loss.

• FEC Always—Always send FEC information with every transmission.

• None—Use when no loss protection is needed.

• Packet Duplication—Enable when packets need to be duplicated and sent on the next available links to reduce packet loss.

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/policies/ios-xe-17/policies-book-xe/forward-error-correction.pdf