[1] Lozko started skating in 2006, training in the same rink as Olympic champion Alina Zagitova.
[2] Lozko debuted internationally in the 2015–16 season, winning the 2015 Denkova-Staviski Cup in the junior category.
She won the bronze medal in Ostrava, Czech Republic, behind Japan's Rika Kihira and countrymate Anastasiia Gubanova.
Lozko then placed fifth in the 2016 JGP Slovenia and failed to qualify for the Junior Grand Prix Final.
Lozko decided to switch coaches going to Moscow to "try her luck" with Eteri Tutberidze, but did not succeed.