From NetFlix:

Willem Dafoe fights the battle of his life as Salamo, a
Greek Jew (and former champion boxer) who’s incarcerated
in Auschwitz by the Nazis and must defeat all comers in
weekly boxing exhibitions. If he doesn’t, he faces the gas
chamber. Based on a true story, Triumph of the Spirit recounts
one man’s fight to stay alive against almost insurmountable odds.

As with most concentration camp movies, this film can be hard to watch. So I put into the category “Not feel-good, not for everyone”. But the acting is good. Willem Dafoe does an excellent job as the boxer. If you can stand to watch, I do recommend this film