[1][2] He won the championship again in 2018, this time in the Junior class, and came out victorious in the IAME Winter Cup that same year.

[6] He won three races and scored fourteen podiums throughout the season, which meant Boya finished second in the drivers' standings behind fellow rookie and teammate Kas Haverkort.

[10] He score multiple points finishes in the first half of his campaign, but the main highlight of the season would be a third-placed podium in Valencia.

[13] Boya joined ART Grand Prix for the 2022 Formula Regional European Championship alongside Laurens van Hoepen and Gabriele Minì.

[18] Boya raced the full season with MP Motorsport in the 2023 Formula Regional Middle East Championship.

[23] In a last-minute signing, Boya announced that he would compete in the 2023 Eurocup-3 season with MP Motorsport, alongside his Formula 3 campaign.

[24] The Spaniard started with a double pole and a victory in Spa-Francorchamps, but was forced to miss the second round in Aragón due to clashing Formula 3 commitments.

[27] A win and a third-placed podium put Boya into the title fight with Esteban Masson heading into the Barcelona season finale.

[36] Boya endured an atrocious start to his season, failing to score in the first three rounds, whilst retiring thrice.

[38] Boya's best weekend came at the Monza finale, having battled teammate Franco Colapinto for the lead, the Spaniard would lose second place to Gabriel Bortoleto on the last lap, but nevertheless scored his first podium.

[40] Boya switched to Campos Racing for his second season of Formula 3 in 2024, alongside Sebastián Montoya and Red Bull junior Oliver Goethe.