In September 2021, it was reported that Phillips had agreed to a three-year professional contract with Blackburn to come into effect from his seventeenth birthday the following June.
[3] Phillips was named in the starting XI for his professional debut in the EFL Cup in a 4–0 victory at home at Ewood Park against Hartlepool United on 10 August 2022.
[4][5] Phillips made his league debut on 14 August 2022 in the game against West Bromwich Albion, playing 71 minutes in a 2–1 win.
[11] Phillips made sixteen appearances for the club, helping them to avoid relegation, and was named their Young Player of the Season.
[15] On 16 September 2022, Phillips along with Rovers teammate Adam Wharton were called up to the England U19 squad,[16] making his debut in a 2–0 win against Montenegro U19.