In 2020 Armanni made his single-seater debut by competing in the Italian F4 Championship with BVM Racing in the last two rounds of the championship at Imola Circuit and Vallelunga Circuit.
[4] He competed in the full season, which started at Circuit Paul Ricard and finished at Autodromo Nazionale di Monza.
He also competed in the opening round of the ADAC Formula 4 Championship at the Red Bull Ring as a guest driver.
[5] In 2022 joined Monolite Racing to compete in the Formula Regional European Championship.
In 2023 he joined Ombra Racing to compete in the Porsche Carrera Cup Italy.