Hungary has been able to modestly increase its fertility rate from 1.2 in 2010 to 1.6 in 2022. The increase is not enough and Hungary will need to raise it that much again to reach a level that is roughly sustainable, but there has been undeniable progress made.
Plenty of widows in Ukraine. Bring in the ones with 3 kids for starters. They can replace the deported gang-bangers.