Yes, it's not currently possible to update the navdata in any of our products on Xbox. The FMS will use the default navdata that comes with the product (2401 for the latest version of the RJ, and 2301 for the latest version of the 146).
I've just checked Aspen (KASE) on my end, and I am seeing the approach procedure listed with the default 2401 navdata. If you're not seeing anything listed, I would recommend uninstalling and reinstalling the RJ just to make sure everything has installed correctly.
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Mark - Just Flight