[4] Munga joined the London Irish Academy at the age of 14 years-old, having been a supporter of the club growing up.
[5] In 2019, Munga played on loan at RFU Championship side Hartpury, scoring a try on debut against Doncaster Knights in October 2019.
[6] Munga made his London Irish debut during the 2019-20 season against Bristol Bears in the Premiership Rugby Cup.
[10] In March 2023 Munga made his fiftieth appearance for the club and that same month started in the 2022–23 Premiership Rugby Cup final which saw them lose to Exeter Chiefs after extra time.
[3][15] In June 2021 Munga was called up by head coach Eddie Jones to train with the senior England squad.