[5][6] She made her debut for Al-Shabab on August 24, 2023, in the Jordanian-Saudi Women's Club Championship, where the team suffered a 3–4 defeat.
[7] After the initiation of the Saudi U-17 Women's tournament in October 2023, Mansour joined the Al-Shabab under-17 team.
Her remarkable performance continued as Al-Shabab dominated its opponents, winning 24–0 and 17–0, with Fatimah Mansour contributing 21 goals, securing her position as the top scorer in the tournament.
[11] In February 2023, Mansour was selected for the inaugural under-17 team to face Kuwait in double friendly matches.
[14] In December 2023, following the establishment of the under-20 team, head coach Pauline Hamill selected Mansour to participate in a training camp held in Riyadh.