Overpaid for "Amount paid with request for extension to file"

So I filed an on Time extension for my taxes this year, at that time I owed $2300 so i paid it online and can see that on my tax transcript.

 

My reason for getting an extension  was due to me waiting on SS numbers for my children as their ITIN numbers had expired. 

 

Last month i got the new SS and filed my taxes where I was due to get a refund on top of the previously overpaid amount.

 

I have received the payment for my tax return and also a missing amount from the 3rd stimulus due to getting my kids ss numbers. However I'm still missing the original overpayment amount of 2300. How long will it take for the IRS to give me this money back? On my taxes it was all included in schedule 3 line 9