I have not heard of a black-eyed pea tradition. My mother had pig's feet, pickled herring, and some othr things like corned beef for "luck" right after midnight. Kind of a pan-European hodge-podge of traditions, I suppose.
I never analyzed it any more than other things like you'll get money if your palm is itching.
Wife1 and I never continued this after we moved out to Colorado.
Anyhow, I repeat: Happy New Year !