If you paid with the extension, it should be flowing to the "Tax Payments" page on line 6 - Overpayments applied to 2021", which is just a total , and doesn't end up in any of the quarters.

The only place I see what it looks like you are seeing is way at the bottom of the "tax payments" page where is asks for "prior year taxes paid in 2021" line 25 amount paid with 2020 extension. I don't have state returns but it looks like that is just for the state's that take federal taxes paid during the year into account.

In anycase your total overpayment applied to 2021 federal tax should be on line 6.