WPT details: https://github.com/web-platform-tests/wpt/tree/master/signed-exchange/reporting https://wpt.fyi/results/signed-exchange/reporting
Signed Exchange Reporting for distributors extends the Network Error Logging to enable the distributors of signed exchanges to investigate signed exchange loading errors such as certificate verification errors.
Explainers: https://docs.google.com/document/d/1Io-MJ1PUqPazZIzDdV2s7oTPGLJZGt15Pbx1ge3JYT4/edit?usp=sharing