You can reorder modules within a checkout step by repositioning the module within the code.
If reordering modules, ensure that you do not disrupt any flow between modules. For example, you want to place both the shipping address and delivery method modules within the same step (Shipping Address). However, the delivery methods available depend on the shipping address. This creates a flow issue. To maintain flow consistency in this case, the shipping address module must always precede the delivery method module in a separate step. Be aware of flow inconsistencies that may exist within step or groups when customizing modules.