[12][13] During the pandemic Mouat took part in a concert version of Hair, directed by Arlene Phillips at the Turbine Theatre,[14] with a follow up performance in West End's London Palladium in June 2021 (rescheduled from April 2021).
[15] In July 2021 Mouat also took over the role of Chloe from fellow Six castmate Millie O'Connell in Be More Chill, which played at the Shaftesbury Theatre during & Juliet hiatus (due to the COVID-19 pandemic) until 5 September 2021.
[16] She played Pilar in the revival of Legally Blonde at Regent Park Open Air Theatre in London, directed by Lucy Moss from May to July 2022.
[18] Mouat was then cast in the title role of Ella in the European premiere of Rodgers and Hammerstein's Cinderella at the Hope Mill Theatre in Manchester, which was set to open in 2020 and was postponed to 2022, with a run from November to December.
[23] In September 2023 full cast was announced for the musical White Christmas, based on the Irving Berlin movie of the same name, with Mouat playing Betty.
[31][32] Mouat is part of the all female group SVN, together with original Six cast members Jarnéia Richard-Noel (Jaye’J), Millie O’Connell, Natalie Paris, Alexia McIntosh (Lexi), Aimie Atkinson, and Maiya Quansah-Breed.