Inheritance law , can a bequest be made to relatives

ran into this post that says no bequest can be made to relatives , just wanted to know if this is purely derived from hadith , it felt like the abu dawood one goes against quran 2:180 which says u can bequest to your parents or relatives . https://www.islamweb.net/en/fatwa/426529/you-must-give-your-grandparents-their-rightful-shares-of-their-son’s-estate are there any other opinions of scholars on this? Does the quran explicitly mention that every legal heir MUST recieve something. this seems to be a good counter argument, and seems like a just distribution:- https://www.reddit.com/r/IslamIsEasy/comments/1navbpl/bequest_in_quran_and_hadiths/