Dependents with L1 visa

We moved to the US in October 2021, and I started working with W-2. My wife and I have SSNs and our daughter was born in December 2021 and got an SSN. But my son (3 years old) was not born in the US and only has ITIN.

 

I have a few questions:

1. As I understood, we can't get Child tax credit for him? Only for her.

I filed on paper (Married-Filing Joint Return) in February 2022 but still didn’t get any information from IRS (online status check says: We cannot provide any information about your refund)

2. Should I call and ask status by phone from agent? I tried so many times and they just cut off after 1-2 hours waiting.