LT8315 non-isolated application phase margin

Hi, support team

I'm evaluating LT8315 non-isolated circuit on page 21 Figure 9.

I want to measure the phase margin of this circuit.

However, I don't know how to measure it because it is not a general Buck.

How can I measure the phase margin using FRA on a real board?

Is it also possible to use LTspice for measurement?

Best regards,

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