The 21-year-old grew up in Tonga but now lives in the United States.
Manumu'a made a name for herself in the sport after claiming a junior world championship medal under the American flag.
She is now competing under the Tongan flag, inspired by her home nation’s history-making rugby league team, and has been working towards the Olympics for the last three years.
She has been handed a tripartite place by the International Weightlifting Federation (IWF).
Manumu'a finished in 14th in the women's +87kg division, one place short of an automatic qualification berth.