Can me and my husband both file 2024 tax return as Head of Household?

We are still legally married during the whole year 2024, but we are not living together for the whole year. 

I am living with our two dependent kids for the whole year and paying all their expense.

My husband is living in a different house with his disabled mother and taking care of her and paying all his mother's house and living expense.  Her mother has about 500 social security income each month and no other income. 

Can i file 2024 tax return as Head of Household, for living and taking care of our two dependent kids?

Can my husband also filing 2024 tax return as Head of Household, for living in a different house and taking care of his disabled mother?

but we are still legally married.