u/Global_Creme2084

So I have an internship that starts on the 2cd of June and as an international student I can only apply on the 4th of May or later, so I have taken the appointment for that date.
A litte background:
Changed status from L2Y to F1, approved and effective from the 15th of March
Approved CPT

My employer said they need my SSN number before the 19th of may but I am just worried about the instant SAVE verification when I go to apply. I have heard that COS students sometimes face delays but I am hearing mixed stories.

What are the chances that I get instant electronic verification while applying?

Thanks!