Date of birth
The Pompey academy graduate signed his first professional deal with the club just before Christmas in 2019.
He has represented England up to under-19 level and made his Blues debut in an EFL Trophy victory over Crawley in 2018.
Mnoga's first senior goal came in the same competition at Cheltenham last season.
He put pen to paper on a new contact at the start of the season before going on to loan to Bromley.