MS Graph Api Colorize Range in Excel - fill missing

I am trying to colorize a row in an Excel Sheet.

My C# Code looks like that:

var formatRequestBody = new WorkbookRangeFormat
{
    Fill = new WorkbookRangeFill
    {
        Color = "#FFF00"
    }
};
await graphClient.Drives[driveId]
    .Items[FileId]
    .Workbook
    .Worksheets["table1"]
    .RangeWithAddress($"A{row.Index + 1}:H{row.Index + 1}")
    .Format
    .PatchAsync(formatRequestBody);

I get the error: The argument is invalid or missing or has an incorrect format.

Based on the endpoint, the code should be like ...Format.Fill.PatchAsync(body)

But the Fill request builder is missing in the SDK.

...
.Format
.Fill
.PatchAsync(formatRequestBody);

Start by tracing the RangeWithAddress(...).Format request-builder chain and compare it with the Excel workbook range-format endpoint described in the issue. Done means the SDK exposes the missing Fill path and the supplied request no longer produces the reported invalid-format error; the payload names no source file or test.