This did absolutely nothing. Carriers like Bandwidth, Commio, Telnyx don’t enforce this and just complete their customers calls as if nothing ever happened.
Link us to some sort of industry news site, or press releases, etc.
No, but that's why I'm skeptical about your claim; I don't think they'd tell you that either.
If they did, I'd encourage you to whistleblow.
As mentioned, there is concern about if the FCC can enforce these rules. But Robospam is bi-partisan. This is one issue I think even our dysfunctional government can agree on.