See, both report and record signify different things in my mind. The original code was just printing to stdout.

In my mind logMissingData makes more sense because it's not actively sending anything; it's just logging.

I would use reportMissingData

Agreed, report feels clearer as the verb "record" is more about permanent storage and later reference.

Or even just reportMissing? Depending on what's happening around call sites, I often find I can drop generic stuff like "Data" and it's just as clear, especially when looking at a function signature. For instance:

func reportMissing(data) { ... }