When I copy paste code between three backticks they are seen as these without colors.

I remember a few years ago when I copy paste code, it became colorful. Is there a setting for this? Note: I am using light theme.
When I copy paste code between three backticks they are seen as these without colors.

I remember a few years ago when I copy paste code, it became colorful. Is there a setting for this? Note: I am using light theme.