no, vQFX is a virtual QFX not a physical one
at least configuration-check does a local checking but not a remote one
there are no release informations regarding the vQFX available
and all the QFX have the nasty attitude, that you can enter or configure things which are unsupported or not working but you do not get any error or commit warnings.
regards
alexander
PS the other error family EVPN and family route-target together I assume is also true for the physical one as it is pure control plane (see my other post in this forum)