Biles debuted her vault, a roundoff, back handspring with half turn entry; front stretched somersault with 2 twists (an upgrade from the Cheng) at the selection camp for the 2018 World Championships.
[7] Biles first started training the double-twisting double-tucked salto backwards dismount off of the balance beam in 2013;[8] however she never performed it during the 2013–16 quad including the Olympics.
Prior to making her comeback Biles posted a video, teasing new upgrades including the double-double dismount off of the balance beam.
Biles expressed disappointment at the skill being undervalued, citing similar maneuvers on different apparatuses and their ratings:[11] "The full-in (full-twisting (1/1) double tucked salto backwards) is an E on floor and a G on beam.
[19] Biles debuted her new floor exercise skill, a double layout with a half twist, at podium training for the 2013 U.S. Classic, eight years after London Phillips completed it domestically in 2005.
At the 2023 World Championships, Hillary Heron of Panama became the first gymnast to perform one of Biles' named skills at a major international competition.
[25] The first time Biles completed the maneuver in competition was at the 2019 U.S. National Championships, joining male gymnasts Ri Jong Song of North Korea and Kenzo Shirai and Kohei Uchimura, both of Japan.
[27][28] During podium training at the 2021 U.S. Classic, Carey performed the laid-out version of this skill, which she submitted to be added to the code of points at the 2020 Olympic Games.