First unemployment deposit is late, what should I check? - first time posting

I applied for unemployment in St. Louis 16 weeks ago and the status page still says pending. I have read a lot of threads here and could not find my exact situation. I called the state line four times and only reached a recording. What would you check first?

Mine took about 16 weeks because of an identity check I did not notice. Look for a message or a letter you may have missed in your online account.

When I finally got through, the agent said my employer had responded late. Once that cleared, back pay came in one payment.