Sidorkova began karting at the age of six, inspired by the animated film Cars. She competed successfully across Northern Russia and the Baltic states, claiming an Estonian karting championship in 2012. At eleven she moved into rallying, and at thirteen she entered touring car racing through the Russian Circuit Racing Series via a Volkswagen programme. She won the National Junior class title in the RCRS in 2018.
Later that year, SMP Racing invited her to compete in the final round of the Formula 4 Northern European Zone Championship, where she finished thirteenth across all three races. This performance earned her a place in the SMP Racing Junior Team for 2019.
In 2019 Sidorkova contested both the Russian and Spanish Formula 4 championships. She finished sixth in the Russian series and eighteenth in the Spanish equivalent. These results, though modest, demonstrated her capacity to compete at an international junior formula level backed by one of Russia's leading motorsport programmes.
Sidorkova applied for the inaugural W Series — a Formula 3 championship exclusively for female drivers — ahead of the 2020 season. She passed the evaluation tests, becoming the youngest driver to qualify at that time. The 2020 season was cancelled due to the COVID-19 pandemic before she could make her debut. In its place, a ten-event eSports series was held on iRacing; Sidorkova finished third in that competition. She returned to the RCRS to fill the gap year, finishing ninth in the Touring-Light class and taking a race win at the NRING Circuit.
Sidorkova made her W Series race debut in 2021. As preparation, she competed in the F3 Asian Championship with Evans GP, finishing twenty-second out of twenty-six participants without scoring points.
Her W Series season showed flashes of strong pace. She scored her first podium in only her second appearance, at the Red Bull Ring in Austria. The rest of the season proved inconsistent: she added a single further points finish in Hungary and missed the round at Spa-Francorchamps after testing positive for COVID-19. In October she was denied a United States visa, ruling her out of the season finale at the Circuit of the Americas. She ended the year ninth in the championship standings.
In November 2021, Sidorkova was among a small group of drivers selected for a one-day FIA Formula 3 test at Magny-Cours, alongside W Series driver Nerea Marti and Iron Dames racers Maya Weug and Doriane Pin — recognition of her potential beyond the all-female series.
Sidorkova was announced as a returning W Series competitor for 2022. However, following Russia's invasion of Ukraine in February 2022, the W Series implemented restrictions on Russian licence holders, and Sidorkova was suspended from the championship "until further notice." She did not compete in any international events that year and returned to racing domestically in Russia, competing in the Russian Circuit Racing Series in the GT4 class with G-Drive Racing SMP Racing by Capital Racing Team.
Sidorkova's career arc illustrates both the promise of Russia's SMP Racing junior development infrastructure and the way geopolitical events can abruptly terminate an international motorsport trajectory. She became the youngest driver to pass the W Series evaluation process and reached the podium in her second race start in the championship, suggesting genuine capability in single-seater machinery. Her subsequent confinement to domestic competition represents one of the more visible human costs of the sporting sanctions that followed the 2022 conflict.