How to use Custom Controller with Services API

I have a Service class with getAllStudentCustom method
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and I use it
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It working correctly

then
I have a Custom Controller class with getAllStudent method
it use getAllStudentCustom in Service class inside
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and I use it
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I can’t get all of my student like use standalone Service API
How I can fix it ?

Do you get any student data in Logger?
Try debugging and see if there is any data in studentServiceCustom.getAllStudentCustom()

The data returned when I use the Service API, you will see in Postman (In the picture)
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