My left me with my boys last febuary 2021. i filed head of household since we been seperated more then 6 months .im been audited

So like i said we been seperated since last febuary my kids lived with me since last febuaury every nite. i filed head of household i claim my half of the advance child credit of 3150 my ex was hetting the other half of 3150, My income taxes was pproves put it said

  

''our tax refund has been approved for direct deposit.
However, it may be partially or completely reduced to pay a past due obligation,
such as child support, another federal agency debt, or state income tax. If so, the
Bureau of the Fiscal Service (BFS), who issues IRS refunds, will send you a notice
with the amount of the debt and contact information. The details of the debt are not
provided to the IRS. This application will be updated with the refund amount
remaining, if any, after the debt is deducted.
If your refund is not credited to your account by March 1, 2022, please revisit this
site or use our free mobile app, IRS2Go, for your revised refund status. Updates to
refund status are made no more than once a day.

So does that mean there taking her 3150 out of my taxes . shouldnt she owe it since she still took the money but didnt live with us . i looked it up and i beleive i couldnt claim that since it was and advancement so just wondering if they will only take 3150 from my refund ?