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TPS54560-Q1: pin-EN is not controllable

Part Number: TPS54560-Q1

Dear team,

In the circuit, R606 has been removed, and D403, D402, R312, C304, and R414 are removed; PIN1 and Pin3 of D402 are shorted. At this time, the voltage of the TP309 was measured to be 23V, and the voltage at the TP408 was about 0.5V, and the 54560 could not be turned on.
When R413 changes from 20K-100K, the voltage change of TP408 is only about 0.2V, and the required turn-on voltage of 1.2V cannot be achieved.
If the resistor R413 is removed, the 54560 can be powered up normally, but the 54560 cannot be turned off at this time.
 
Please help to analyze, we hope that the 54560 is controllable.

Thank you very much!