In my experience it’s not weird that someone with a Cn higher than yours (60k) has received the email of processed Documents before than you.
Also when I have received mine ( middle of March) with Cn 27k in EU, there is someone with 30k that received the email firsts days of March.
I don’t know in what order kcc decide to process documents, but also in my case kcc processed them before me, even if my Cn was lower than their. So it’s not weird at all. Even before of pandemic they did that. And I sent all my documents in October and my DS260 on May 2019. So it was not my fault or my delays.
I am sure that you will receive your email too, wait !!