Amallah was born in Hautrage [fr], Belgium, to a Moroccan father, Houcine Amallah, and a Belgian mother of Belgian and Italian descent, Antoinette Caufriez.[3][4] He is a cousin of fellow footballer Maximiliano Caufriez.[5] Amallah began his senior career with Royal Excel Mouscron in 2015. He moved to Tubize in the following year, before returning to Mouscron in 2017.
Standard Liège
Amallah joined Standard Liège in 2019. On 12 December 2019, he scored Standard's second goal to put the club up on Premier League club Arsenal during the group stage of the Europa League; but Arsenal scored twice in the final 12 minutes to snatch a 2–2 draw.[6] Three days later, he scored in Standard's 1–1 draw against his former club and rivalsAnderlecht.[7]
On 1 October 2020, in a UEFA Europa League play-off match against Fehérvár, Amallah scored twice from the penalty-spot to help secure a 3–1 win and qualification to the group stage.[8] In November 2020, he was awarded with the Belgian Lion Award, given to the best player of Arab origin playing in Belgium.[9] He succeeded his compatriot, Mehdi Carcela, who won the previous two editions.[9] On 13 March 2021, he scored the only goal as Standard defeated Eupen to reach the final of the Belgian Cup.[10]
Valladolid
On 31 January 2023, Amallah signed a four-and-a-half-year contract with La Liga side Real Valladolid.[11] He scored twice in seven appearances during the remainder of the season, as the club suffered relegation.
Loan to Valencia
On 29 August 2023, Amallah moved to Valencia CF in the Spanish top tier on a one-year loan deal.[12][13]
International career
Amallah was born in Belgium and is of Moroccan and Italian descent.[14] He chose to represent the Morocco national team at the international level and made his competitive debut in a 0–0 draw with Mauritania on 15 November 2019 in qualification match for the 2022 Africa Cup of Nations.[15]
On 9 October 2020, he scored his first goal for the Atlas Lions in a match against Senegal after being set up by Achraf Hakimi. He then provided an assist for Youssef En-Nesyri's goal in the 71st minute as Morocco won 3–1.[16]
His mother Antoinette died when he was 14 years old. Amallah has since played every game for her, and honored her at the 2022 FIFA World Cup, where he played an important role for Morocco, eventually reaching the semifinals and finishing the tournament in 4th place.[4][19]