In October 2020 Edgar completed the first post-season test at Catalunya, running for MP Motorsport. Later that month, the Dutch outfit once again fielded Edgar in the second post-season test at Jerez. In December, Edgar partook in a test with the Carlin team at Algarve. On the 15th January Edgar was announced to drive for Carlin in the 2021 season, partnering Ido Cohen and Kaylen Frederick. He qualified 12th and thus started on pole on his debut as a result of reverse grid.