Splitting 3rd stimulus after u file married filing separate

We have always file married filing jointly, this year however married filing separately seems to give us a bigger tax break. However our third stimulus was combined total. Do we just split it per person and dependent?
My husband is going to file for two kids, and claim three people for the stimulus money and I am going to file with one child, and two people for the stimulus money. Is this allows?? There are no forms for this… We received it in full and neither of us filing need the credit.