Not getting the expected output from my switching regulator
This converter has a constant peak inductor current of as much as 3.9A in normal operation.
Your inductor looks suspiciously small. Check the saturation current and/or substitute a Würth 7447714150 with 4.1A typical saturation current, as used in the evaluation board.
It will not fit your existing PCB layout. Probably nothing that will work will fit. Which is okay, since it needs significant improvement anyway.