I have an LAX-MEX premier J class on their 787 new week. There is a link on the reservation to select the meal, but I have been checking since 7 days in advance and after clicking on the meal selection link, it then says not available.
Do they only offer it to selected passengers? It is a paid full fare, but booked via Delta (though I have the Aeromexico record locator and can see my reservation on the Aeromexico web site)