You need the roof supports, then from there you can add on any number of accessories (ski/snowboard rack, cargo box, etc.)
here is the link to the OEM version.
https://www.shopbmwusa.com/PRODUCT/6...SUPPORT-SYSTEM
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'22 G05 X5 45e xDrive mSport - Phytonic Blue/Cognac
'19 G30 540i xDrive - Mineral White/Beige, 2017 Toyota 4Runner Limited, 2009 E90 328i xDrive, 2006 Audi A6 Quattro, 2002 Chevy Tahoe LT 4WD , 2002 Audi TT Roadster (all retired)