No. In accordance with the visitor rules on prohibited items and activities, visitors may not bring carry carts, suitcases, or carts used to transport goods into the Expo site.
Please use backpacks or baby carriers to transport family robots. In addition, it is prohibited to run the family robots around the site as it may obstruct other visitors.

https://www.expo2025.or.jp/en/wp-content/uploads/sites/2/2025/01/Handling-of-Large-Baggage-at-the-Expo-Site-during-the-Expo.pdf