my husband, my 15 year old daughter and I recently became permanent residents on 2019. We are currently unemployed but do we have to file tax returns?

Hi,

My husband, my little daughter who is 15 years old and I recently got a greencard on 2019. My older daughter who had her education here in USA, is currently working here in States with a visa. (She's not a permanent resident as 3 of us). Nowadays, we stay with her. However, my husband and I are currently unemployed and looking for jobs while my older daughter is taking care of all of our expenses. I was wondering if we are eligible for the stimulus check even though we haven't filed our tax return due to us having no income. My older daughter did and she got hers. Do we have to file a tax return even though we are both unemployed with my husband?