> However, presumably PowerShell requires at least the .NET Runtime if not the .NET SDK, doesn't it?
Nope, these days .NET programs (like PowerShell) bundle the runtime. But even if they did a lighter distribution that depended on the runtime already being installed, there would be no .NET telemetry sent.
> Does running the recommended "dotnet --list-runtimes" command send telemetry, like most of the commands?
This is still an SDK command. I don't personally know if this one sends any telemetry.
> Or are you saying that the Runtime, unlike the SDK, doesn't include telemetry at all?
The runtime does not send telemetry.