Question regarding form 8962

Unmarried couple with 2 children. For tax purposes, she claims one child I claim the other. I claim Head of household status. Listed both kids but 1 is classified as not a dependent.

For insurance purposes, policy is purchased through the state program. I enrolled both kids and myself and she enrolled herself. 1095A received for me lists the 3 of us. Her 1095A lists just her. So when filling tax return on form 8962 do I list the 3, myself and kids? Do I need to fill out part 4 and allocate 100% to myself and list her SS number? Does she also have to fill out part 4?