Question: Can LTM8024 μModule be design to have a negative output voltage?
Answer: Yes, the LTM8024 μModule can be set to have a negative output with minimal design effort but unfortunately you can only have one (1) output since the GND is common for the dual output. The DN1021 design notes entails how to design a μModule to have a negative output voltage. DN1021 - How to Produce Negative Output Voltages from Positive Inputs Using a uModule Step-Down Regulator (analog.com)