current availability on the xavier developer kit? what is the current lead time ?

We are having challenges with various components and are working continuously to address the issue. In meantime, if you are building a commercial product might want to consider our partner systems if they have inventory.
See also: Announcing Jetson Partner Development Systems - Jetson & Embedded Systems / Jetson AGX Xavier - NVIDIA Developer Forums

ok what please elaborate on what a comparable product to xavier would be, and also please can you provide an actual time estimate