W-2 Reporting of Regular (Non-Roth) After-Tax Contributions

[401 Chaos]

Based on some prior (but pretty dated) posts here and other items, it seems separate Form W-2 reporting of regular, after-tax 401(k) contributions (i.e., non-Roth contributions) is more of an optional than a mandatory item that may be reported in Box 14 of Form W-2?  Does that seem a fair statement? 

The employer will include the after-tax amounts as part of wages subject to tax and withholding getting reported but the question is do they also need to separately break out and report the after-tax 401(k) amounts elsewhere on the W-2?  They prefer not to do so which I suppose is understandable from an administrative perspective although I can see some benefit to including this information for transparency and confirmatory purposes.  (Seems like that may also prove useful if questions ever arise as to what a participant's basis is in the after-tax account under the plan (e.g., if the record keeper loses track of that information going forward)).  Thanks.