Olislagers started her career with her hometown club BVC Bloemendaal at the age of eight. She then played for RKVV DSS, Telstar and CTO Amsterdam in her youth career.[2]
In April 2018, Olislagers joined Eredivisie club ADO Den Haag.[3] She made her debut on 7 September 2018 in a 2–0 league defeat against Excelsior.[4] Olislagers scored her first league goals, a hattrick, against Achilles '29 on 12 October 2018.[5] On 13 June 2019, she extended her contract with the club for one more season.[6]
In April 2020, Olislagers moved to Twente.[7] She made her league debut against Ajax on 6 September 2020.[8] She scored her first league goal against ADO Den Haag on 23 April 2021, scoring in the 80th minute.[9] On 3 May 2022, she extended her contract along with Daphne van Domselaar and Fenna Kalma.[10]
Olislagers has represented Netherlands at various youth levels.[13] In November 2021, she received her first call-up to the senior team.[14] She made her debut on 29 November in a goalless friendly draw against Japan.[15]
Olislagers was called up to the final Netherlands squad for Euro 2022.[16]