zx list pending PackageName
List the versions of PackageName currently submitted and awaiting review by a maintainer.
From the "submit" command example:
ceverett@takoyaki:~$ zx package code/my_app Packaging code/my_app Wrote archive ./my_realm-my_app-0.2.0.zsp ceverett@takoyaki:~$ zx submit my_realm-my_app-0.2.0.zsp ceverett@takoyaki:~$ zx list pending my_realm-my_app 0.2.0 ceverett@takoyaki:~$