Renouard's athletics career began in 2016 as a 1500 metres runner. In 2017, she finished 4th at the French U18 Championships in that event, followed by finishing 10th at the 2018 French U20 Championships.[5] She improved back to 5th at the 2019 French U20 Championships, and a 2nd-place finish at the Cross National du Val-de-Marne - Ile de France earned her selection to represent France at the 2019 European Cross Country Championships in the U20 race.[6] At the championships, she finished 10th overall and contributed to her team's bronze medal.[7]
Renoard's 2023 indoor season was cut short by a knee injury, delaying her start to racing by five months.[3][14] Renouard finished 2nd at the 2023 European Athletics Team Championships First Division, though because her time was slower than the Super League 3rd-placer, she did not win a 2023 European Games medal which the competition doubled as.[15] With a new personal best of 9:19.07 at the 2023 Anniversary Games, she qualified for her first World Championships later that summer. The time also surpassed the qualifying standard for the 2024 Summer Olympics, guaranteeing her a spot assuming three other French women do not meet the standard ahead of her.[3] At the Worlds steeplechase, Renouard finished 9th in her semi-final and did not advance.[14]