The reason Freud isn't mentioned is that he isn't relevant in modern psychology or psychiatry, except in French Canada, France, and Germany. Even if you believe (tm) in psychoanalysis, the modern approach do not follow Freud's teachings [0], not that it's that much better now. (btw I'm not objective on thatmy mother spent 25 years, a divorce, an estranged daughter and a lot of money on psychanalysts. At 23, i told her to see a real psychologist. After 2 session, she sent her to a hospital see a psychiatrist. Bam. Bipolarity, triggered by anti-inflammatory medecine. During 25 years of her life, she was half the time in manic phases, for days, and not a single charlatan detected it.)
[0] https://link.springer.com/referenceworkentry/10.1007/978-94-...