XUnitLoggerProvider Class

var testOutputHelper = TestContext.Current.TestOutputHelper;
using var provider = new XUnitLoggerProvider(testOutputHelper);
using var host = new HostBuilder()
    .ConfigureLogging(builder =>
    {
        builder.Services.AddSingleton<ILoggerProvider>(provider);
    })
    .Build();

var logger = host.Services.GetRequiredService<ILoggerFactory>().CreateLogger("MyCategory");
logger.LogInformation("This message will appear in the test output");