Welcome to the forum calvinyjj
If you do a forum search you will find that efforts to support Apple products are pretty much a waste of time, and that MusicBee is not doing that.
(well, not anymore, there have been efforts in the past)
Apple loves to protect their own eco-system (I think maybe they love money too), so they are not sharing much (if any) information on e.g. protocols they are using.
And when someone clever finds a way to make things work anyway, Apple will do their best to find a way to break that functionality again.
(yeah, lovely people, lovely company)
Your only hope would be somebody creating a plugin for MusicBee for this.
But it's not something the sole developer of MusicBee should be expected of to waste any of his time on.
Perhaps give MediaMonkey a try?
MediaMonkey is a commercial product (quite nice, and feature-wise very similar to MusicBee) with a paid staff that I believe is advertising being able to synchronise with iStuff.