Renson was elected a week later by his peers to one of the six vice-presidencies of the National Assembly, a rare occurrence for a new member, a position in which he succeeded David Habib of the Socialist Party.

[7] Ahead of the 2020 Paris municipal election, Renson failed to win the party nomination for the mayorship against Benjamin Griveaux.

[10] In July 2019, Renson voted in favour of the French ratification of the European Union's Comprehensive Economic and Trade Agreement (CETA) with Canada.

[11] In 2020, Renson went against his parliamentary group's majority and abstained from an important vote on a much discussed security bill drafted by his colleagues Alice Thourot and Jean-Michel Fauvergue that would have helped, among other measures, curtail the filming of police forces.

[14] In early 2021, Renson joined ten fellow LREM lawmakers in demanding the end of the state of emergency declared by the government of Prime Minister Jean Castex in response to the COVID-19 pandemic in France.