The only thing I know about my mother's finances is that my sister and I are on some of her accounts, and that my sister is her executress.
That was discussed several years ago and I asked my mother to put my sister in that position as I suck at math and paperwork, plus I live out of state.
I also assume I am/was beneficiary on one or more accounts/policies as my mother has asked for my social security number a few times.
That said, I doubt there's more than enough to provide for a funeral. I do remember,when I was in my early teens, my parents showing me the household budget, but there was never enough for investments, etc., in my family.
As regarding my mother's net worth, I haven't the foggiest. I'm just assuming not much. Like me, she was widowed young, and like me, she lost her shirt. I would assume any investments the family had at that time went for bills, just as happened to me.
I just hope she has enough,w pension/SSDI to live out the remainder of her life fairly comfortably. (Our idea of comfortable probably isn't the same as many here.)