[2][3][4] Native of Nong Khai, a small province bordering Laos, separated by the Mekong.

When competing in Muay Thai, she used the name "Nongbee Por.Prasith" (น้องบี ป.ประสิทธิ์) and had a record of 7 consecutive wins until she had no opponents and had to turn to amateur boxing instead.

[5] Suwannapheng represented Thailand at the 2024 Summer Olympics in the women's boxing 66 kg (welterweight) category.

In the second stage (round of 16), she defeated Brigitte Mbabi from the Democratic Republic of the Congo 4–1.

In the quarter-finals (round of 8), she defeated Turkish number one seed Busenaz Sürmeneli 4–1.