<PackageReference Include="Microsoft.Identity.Client" Version="4.82.1-preview2" />

Microsoft.Identity.Client.TelemetryCore.IHttpTelemetryManager

interface IHttpTelemetryManager
Controls the HTTP telemetry that MSAL sends to AAD via HTTP headers when contacting the /token endpoint.
string GetCurrentRequestHeader(ApiEvent currentApiEvent)

Csv string with details about the current header (api used, force refresh flag)