Mr.Sam2
Since no doctor accepts the halachic defintion of death, we are in no position to permit organs donations which are done by doctors without any regard for halacha.
The overwhelming majority of leading poskim reject brain death. Even if you accept brain death at some point, there’s a whole separate issue of allowing the doctors to determine when brain death is.
Since a majority of poskim prohibit organ donation, (among them Rav Shlomo Zalman Auerbach and Rav Eliezer Waldenberg who were very close to many medical experts) it is prohibited to donate organs.
PS I’ll take the gehenim for all those who follow the leading poskim and are asked after 120 why they listened to them and not sam2!