Help! Is there standardization in i2s?

No. 
Not Nostradamus.

+1 fuzztone

As I understand it, I2S has no standardization, only proprietary implementations.  That seems not likely to change in the marketplace.

Really, No standard, What year are we in??? I2s has been around quite awhile. Someone better get working on that 😤 

It brings back memories of an old B&O receiver… I always wondered why?

Not yet, but i agree it should be and will be standardize.
https://www.6moons.com/audioreviews2/i2s/1.html

Alvin Chee @ Vinshine Audio

Nostradamus and CAlifornia Psychics would agree that the 6moons article is informative…I 
looks like I might have to make my own cable.
Alvin - Thanks for the info!

I2S is an electrical specification, not a mechanical/physical one. Vendors using it outside their box normally turn it (I2S is single-ended) into an LVDS set of differential signals. The allocation of those signals to physical pins in the HDMI connector is different between vendors.