[5] Early in her career, she made her mark as a lawyer involved in corporate disputes and was active in projects in sub-Saharan Africa.

From late 2017 on, Avia was part of LREM's 20-member executive board under the leadership of the party's chairman Christophe Castaner, in charge of communications.

[11][12] In September 2018, after Richard Ferrand's election as president of the National Assembly, Avia announced her candidacy to succeed him as chair of the LREM group.

[13] In July 2019, she stood as a candidate for the chairmanship of the Committee on Legal Affairs; however, she was defeated in the second round by the incumbent chairwoman, Yaël Braun-Pivet.

[17][18][19] In a 12 May 2020 article from the online investigation site Mediapart, former parliamentary assistants accused Avia of using racist, sexist and homophobic language in communicating with her team.

The publication of this article happened the day before the final vote at the parliament for a law brought forth by Mrs Avia and aiming at censoring hate speech online.

[22] According to the previously mentioned Mediapart article, Avia asked her assistants to remove information about the taxi driver controversy from her Wikipedia page in French.