I witnessed employers doing that to get people greencards too. Claim the exact combination of their stack plus experience in the domain is a requirement. Only way to meet that is to have been working the job.
This is referred to as tayloring and it is not allowed. Furthermore you have to have the experience for the job from before you started working for the sponsoring employer, so tayloring can only target your prior experience, not what you learn on the job.
