Second Half of Child Tax Credit not Showing as Refund Amount

Why isn't the second half of Child Tax Credit showing on/as my refund? My estimated refund amount actually decreased significantly once I input my advanced payment amount already received. I received the monthly payments from July - December via direct deposit. Amounts are correct, I was not over payed.  Is the second half supposed to show as a refund amount or are we receiving this from the IRS separately as before (not included in 2021 refund). Help please.