JustinHEMI
https://www.realoem.com/bmw/enUS/select
Put the last 7 digits of your vin into real oem, that will pull up USA (includes Canada) specific info for your specific car. Then go to rear axle -> rear differential/mounted parts -> item 11 and that will tell you what fluid goes in your car.
Or you can call a different dealer and ask them.
It is not the end of the world if it is SAF-XJ since it was used before, but bmw is making a switch to MSP/A and I do think there was a purposed behind this switch due to the huge failures in 2016 and earlier cars. So that is why im a heavy advocate of MSP/A or what ever bmw suggests to use. Normally I would not hesitate to go after market like for my manual transmission I am currently looking at motul or redline, but for the diff I am really unable to look past MSP/A since I know this thing has a track record of being finicky and failing.
What is a big deal is SAF-XO, that is hugely wrong and not even close to what is supposed to be put in a LSD.