[11] In February 2022, Allen was bought by the Royal Challengers Bangalore in the auction for the 2022 Indian Premier League tournament.
[13] In August 2024, Allen signed a two-year deal with the Perth Scorchers in the Big Bash League ahead of the 2024-25 season.
[14] He started his stint poorly, with a string of single-figure scores, before finding form mid-tournament with a couple of hard-hitting fifties.
[17] In New Zealand's second game of the tournament, against Kenya, Allen scored a half-century off just 19 balls, the joint-second quickest in Under 19 ODI history.
[20] He made his T20I debut for New Zealand on 28 March 2021, against Bangladesh,[21] scoring 71 in 29 balls in his 3rd game, opening with Martin Guptill.
[30] In August 2024, Allen declined a New Zealand Cricket central contract in order to pursue international franchise opportunities.