I cannot get into my old phone I’m not sure the Apple ID as it’s my 4 year old daughters phone now

I had an iPhone 8 Plus I cannot get into I got a new phone with my husband and we kept the 8 plus as my 4 year old daughters. He can’t remember the Apple ID he used to set it up the iPhone will show on my mom and brothers account Jennifer Pratt ( Clawson) and Dallas Cain. My husband has already gone through the help center and they couldn’t help as he was not the one that bought it. Please help