VS code format on save with modifications option is not working with .scss files

Steps to Reproduce:

1. Go to vscode settings
2. click on formatting in user
3. select modifications option in Format on Save mode
4. Goto .scss file and make changes
5. sass files are not getting formatted

vs code settings https://i.stack.imgur.com/NQEdQ.png

sass file https://i.stack.imgur.com/xX1Nb.png