sorry missed this post. Have an EQC delivered in Sept ordered the previous April. Delivered without AR which will apparently be retro fitted once the chips are available, some chatter mercedes germany are saying this month.
It has been removed from later builds apparently for the EQC do not know re EQA but suspect it is the same. So you need to find out what was the spec whn you ordered, if it incl AR contact the dealer and ask when they will be retrofitting. Have a look around the EQC thread there was a lot of discussion on this point.