With how Github is doing this, there's no way to tell who or what was actually involved, thus impossible to verify if the DMCA claim is BS or not:
https://github.com/github/dmca/blob/master/2024/06/2024-06-1...
If you're making a claim of copyright infringement, your name / who you represent and the nature of the violation is not "private." And further, that redacting is purely Github's decision; nothing in the DMCA requires any redaction or limits publishing of DMCA notices in any way.
...and hilariously, GitHub rejected the counter-notice because...it didn't have the right kind of contact info?