Yes you’re right, it’s BMW’s color which is called Sparkling Kupfer Grau metallic. In middle east countries it’s called Volcanic Ash Grey and in U.S it’s called CU Later grey.
In my country Qatar, Toyota dealership only offers tan interior in all 3.0L 2023 models even if you choose any exterior color they only offer tan interior with it.
Do you know that Toyota in some countries in middle east offers CU Later color as a normal option and it’s called Volcanic Ash grey.
I think it’s only in U.S that considered a limited option.