Interesting you should say that as it does show in GAL.
EK 147 Y 15JUL DXBAMS HS1 0825 1330
9B 9364 Y 15JUL AMSZYR SS1 1531 1710 OPERATED BY THALYS
9B 9327 Y 22JUL ZYRAMS SS1 1150 1328 OPERATED BY THALYS
EK 148 Y 22JUL AMSDXB HS1 1530 2359
But it won’t price a through fare with Emirates. This is a plan B for those who are happy (and sensible?) to take the train on this leg buying the Thalys ticket separately.