api.RTCStatsReport.type_inbound-rtp.nackCount - reported by at least Safari for iOS 17.1.2

What type of issue is this?

Data quality

What information was incorrect, unhelpful, or incomplete?

nackCount is reported by at least Safari for iOS 17.1.2 and probably other browsers at older versions.

What browsers does this problem apply to, if applicable?

Safari, Chrome, Firefox

What did you expect to see?

If support status is unknown or hasn't been captured, I would expect the table to reflect that instead of definitively saying the feature is unsupported.

Did you test this? If so, how?

Yes, I reviewed the output of the stats API reported by a Safari for iOS 17.1.2 client and a Chrome Mobile WebView 121 client and @hamishwillee reviewed the output of Chrome 121 and Firefox 123 user agents.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

No response

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/RTCInboundRtpStreamStats/nackCount

MDN metadata

Start with the MDN RTCInboundRtpStreamStats/nackCount page and the BCD entry identified by the query api.RTCStatsReport.type_inbound-rtp.nackCount. Compare the recorded Safari, Chrome, and Firefox support data with the reported API output; done means the compatibility table no longer definitively marks the feature unsupported when support is unknown or present.