My mum passed away earlier this year age 90.
I got cards from my close friends, similar age to me late 40s into 50s, plus some texts, and flowers from a group of local friends and my work.
However, not one of my mums friends or neighbours (ages prob mid 60s up) sent a card, even though my DB and I were at her house for almost a week after she died and again for the funeral a week after that. Her closest friend did visit, but more at my request as she was also her longest standing friend and we wanted to confirm info for Eulogy.
Similarly with my relatives, one female cousin sent both myself and DB a card, no other cousins did, neither did my dads relatives in Ireland, although my uncle and auntie came over for funeral.
I would always send someone a card when a close relative died, but it seems not everyone holds the same thought!