Is it possible, that the PDF creating is made with option PrintBackground enabled?
This would result for example in more beautiful Alerts in created PDF file:

> [!NOTE]
> Information the user should notice even if skimming

Source: https://github.com/dotnet/docfx/blob/a58fec70cdaa98d6348d1cb3e0185f19a5ca6c48/src/Docfx.App/PdfBuilder.cs#L167C17-L167C18
Suggested change:

return await page.PdfAsync( new PagePdfOptions()
{
	PrintBackground = true
});