Cheng first became known as founder of North York Moms, an online discussion forum for mothers in the Willowdale area.
[2] Prior to her election in 2022, she also served as the executive director of the NeighbourLink North York food bank.
[3] Cheng ran against incumbent councillor John Filion in the 2018 Toronto municipal election.
Filion had originally intended not to run again that year, and had in fact endorsed Cheng as his successor in the former Ward 29,[4] however, after the provincial government of Doug Ford passed legislation cutting the size of the city council in half by aligning ward boundaries with provincial and federal electoral district boundaries in the city, Filion changed his mind and ran again, winning the seat over Cheng.
She campaigned largely on issues of housing in the ward, including opposing a controversial supportive housing development on Cummer Avenue[7] and lobbying for greater community input into a municipal plan to lease a hotel in the ward as an emergency homeless shelter.