It's cheaper for BMW to make a one size fits wiring all for each model but they usually will leave out the relevant module or just not switch it on in the program.
Trying to get the wheel tied into the I-Bus so it controls the radio and cruise settings could turn into a nightmare as most $tealers don't want to know about such retro-fits. If they do show interest it's because they smell buckets of cash at the end!!

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2021 X5 xDrive40i
2015 X5 xDrive35i MSport
(Traded) 2013 X5 xDrive35i