Amaechi is from San Francisco, California, U.S.[1] In 2018, she won the ECAC/IC4A Outdoor Championship discus event, competing for Princeton Tigers.

[1] As of 2022, she was the Ivy League record holder in discus, and had received All-America honors twice.

[3] Amaechi made her debut for Nigeria at the 2022 African Championships in Athletics, finishing third in the discus event.

[4] Later that month, she won the Nigerian National Championships event, which was also a qualifier for the 2022 Commonwealth Games.

[7] Amaechi was one of three Nigerians who competed in the discus event at the 2023 World Athletics Championships.