"scope for improvement" is correct and usable in written English. It is typically used to indicate that a given situation can be improved in some way. For example: "The company's customer satisfaction ratings were good, but there was definitely still scope for improvement.".
20 Where scope for improvement existed, we found many examples of improved, and none of worsening, practice.
The scope for improvement is clear.
There is plenty of scope for improvement.
Havering's scope for improvement is small.
But there is scope for improvement within Goodison.
Even on the bowling front, there's scope for improvement.
He does not really believe there is scope for improvement.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia