everything is correct with logic

Nothing is correct with this logic. You're providing only partial implementation of sort function. It may work in later node versions, but you can't rely on that.

expected '[9,9,9,9,1,2,1,1,3,1,0,0,0,0,0,0,0,0,0,0]' to equal '[9,9,1,2,1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0]'
            your function returned this                               this was the expected value

Fix your code.

Instructions: Write an algorithm that takes an array and moves ALL OF THE ZEROS to the END, PRESERVING the order of the other ELEMENTS.
Log arr: [ 9, 0, 0, 9, 1, 2, 0, 1, 0, 1, 0, 3, 0, 1, 9, 0, 0, 0, 0, 9 ]

expected '[9,9,9,9,1,2,1,1,3,1,0,0,0,0,0,0,0,0,0,0]' to equal '[9,9,1,2,1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0]'

Where in the instructions it says that 9 needs to be moved to the beginning, fix it