I did not find any consultation. There are mentions of collaborations with small business and retailers but nothing with entities that they own and control fully.
I did find that they have consulted with "Sumo Group Entities" which is a small section on page 6.
p. 6
"Process of consultation between Sumo Group Entities
The operations of the Sumo Group entities are fully integrated. The entities have common directors and share the same executive and management teams and employees, as well as governance structures and policies. Only Sumo Australia Limited meets the revenue threshold and therefore has a reporting obligation under the Modern Slavery Act. The process for developing and executing the response to the Modern Slavery Act, and development of the Statement, has been a cross-disciplinary project led by the Legal and Compliance team."