Did Yaakov ever find out what his children had done to Yosef?
On the one hand when Yaakov dies the borthers tell Yosef that their father insisted Yosef not take revenge on them and harm them. That indicates he knew what they had done and was considered he would take the opportunity of his death to avenge the old fight.
On the other hand, if he knew, why did he not censure them (all the kids) when he gave the brachos, like he censured Shimon and Levi for their actions against Shchem and Chamor? So maybe he did not know.
But if he did not know, when all of the sudden Yosef show up as Prime Minister of Egypt, was he not curious where Yosef had been and what had happened to him for the past 22 years and how and why he disappeared? He must have asked some questions - how did they all answer those questions?