Email security…
I know that when I’ve used my non-Omni email address to communicate with HQ, it often gets captured in the very intense security web around our email system. I’ve received a reply 5-6 days later starting with an “Oh my, your email was held up in our security layers!”
The person handling hiring & HR is insanely busy, so I’m not surprised you’re not hearing back…but it would indicate a probable TBNT in my humble opinion. I, like those in my class & those just before & after got rapid offers & upon acceptance, the on-boarding process began almost immediately.
best of luck in your future endeavors.