Bulnes was elected to the
Chamber of Deputies in the
parliamentary elections of November 2021 as an independent candidate running on a seat allocated to the
Democratic Revolution party, within the
Apruebo Dignidad coalition. She represented the 17th district of the Maule Region, which includes the communes of Talca,
Curicó,
Constitución,
Molina,
San Clemente, and others. She received 8,411 votes, corresponding to 3.49% of the valid votes cast. She assumed office on 11 March 2022 for the 2022–2026 legislative term. During her time in parliament, she served on several standing committees, including Agriculture, Forestry and Rural Development; Ethics and Transparency; Older Persons and Disability; Human Rights and Indigenous Peoples; Housing and Urban Development; and Family. Bulnes also participated in a number of special investigative committees, addressing issues such as alleged overpricing by Metrogas, compliance with the 1947
Endesa irrigation agreement related to the
Laguna del Maule, the
San Ramón Fault, the transfer of public funds for informal settlements, and a
Burkholderia cepacia bacterial outbreak. From July 2024, she was a member of the
Frente Amplio and Independents parliamentary committee. ==International activities==