I’ve read the review published at
http://www.dvdcritiques.com/Actus/4482
By using google translate: Smyth Realiser A16 test: your home cinema room modelled identically for listening through headphones
As part of the Decoding (s) subdivision of the review, I’ve noticed the following phrases: “Auro-3D will soon be released in 9.1 for those who appreciate this format. A software update to the DTS: X Pro is also announced for 2021.”
In my understanding that means Auro-3d decoder might be available earlier than DTS:X on the Realiser A16. Our French speaking colleagues here might want to check that information with Bruno Orrù (the author of the review) or better with Gilles Gerin.