Make an extension method over StringBuilder.AppendLine with specific FormatProvider

In order to avoid using the code which always explicitly passes FormatProvider

StringBuilder sb = new ();
var invariant = CultureInfo.InvariantCulture;
sb.AppendLine(invariant, $"Now: {DateTime.UtcNow:yyyy.MM.dd HH:mm}");

, decided to make an extension method, to be able change the code above to the next view

StringBuilder sb = new ();
sb.AppendInvariantLine($"Now: {DateTime.UtcNow:yyyy.MM.dd HH:mm}");

, but due to lack of understanding of interpolated string internal implementation, was not able to do it.

My best was

public static StringBuilder AppendInvariantLine(
    this StringBuilder stringBuilder,
    ref StringBuilder.AppendInterpolatedStringHandler handler)
{
    return stringBuilder.AppendLine(CultureInfo.InvariantCulture, ref handler);
}

, but it is even not callable, let alone correctness of the implimentation.

The compiler error with this call sb.AppendInvariantLine($"Now: {DateTime.UtcNow:yyyy.MM.dd HH:mm}") :

CS1615: Argument 3 may not be passed with the ‘out’ keyword