Cashing a Series EE bond

My grandmother, who will be turning 100 years old in Dec 2022, bought savings bonds years ago where i, her grandson, is the beneficary.  the bond is POD.  She has nearly spend her life savings over the past 10 years living in a nursing home.  I am wondering if she could cash that bond in to help to cover her living expenses and what would the tax implications be for her.  She has no income other than SSA which is approx 13K/year.