Yes there was available stock, and more Jetson Xavier NX modules continue to ship to our distributors. Distributors’ online buy pages (e.g., this one) are intended to serve small quantity purchases, and if one shows the module to be out of stock, go ahead and “request quote.”
Distributors will fulfill Jetson Xavier NX module orders the 2nd half of this month, at the same time JetPack 4.4 Developer Preview is made available.
By the way, don’t worry about the “16 weeks manufacturer lead time” note at the distributor page linked above. That is true generally for large volume, un-forecasted demand. When ordering larger volumes of Jetson modules, you should definitely contact your distributor in advance and provide your forecast. They will get you a specific quote including lead time.