Did Yaakov bless Dinah?
If not, why not? Even if Yosef’s wife was Dinah’s daughter, it’s not the same as blessing Dinah herself.
If she died before Yaakov then how can people say that his last 17 years in Egypt were happy?
DIna did geet blessed from Yackov. Dina married Shimon (see Rashi 46-10) therefore the bracha that was given to Shimon (see 49-28, and Rashi) was like giving her a bracha also.