2019 Baby - Just filed taxes. When/how do I receive their stimulus?

We just filed our 2019 taxes (as we just received our baby's SSN in order to do so). We filed an extension so we were within the timeframe.

 

My wife and I received the Stimulus funds. Now that the IRS has our baby's information on file from 2019, when will receive their $500 amount? Do we need to take any steps or will this be automatic?

 

Thank you in advance!