An Olympian, she and Pearly Tan created history by becoming the first ever Malaysian semi-finalists at the women's doubles event at the 2024 Summer Olympics.

She won the gold medals at the 2022 Commonwealth Games in the women's doubles with partner Pearly Tan and in the mixed team event.

[7] Having successfully advanced from the group stage with a 2–1 record, they defeated then ranked 7th in the world Kim So-yeong and Kong Hee-yong from Korea in the quarter-finals in straight sets, before falling to Chen and Jia in the semi-finals and Japan's Nami Matsuyama and Chiharu Shida in the bronze medal match.

Thinaah and Tan reached their first final in 2024 at the Korea Open, finished as runner-up to home pair Jeong Na-eun and Kim Hye-jeong.

[10] She is fluent in all four main languages spoken in Malaysia: Tamil, Malay, English, and Mandarin, in which she picked up from her ethnic Chinese friends whilst studying at Bukit Jalil Sports School.