In my VS Code, when I right-click on an Apex class I can't see 'SFDX:Diff File Against Org' command. But this is perfectly working for Aura components or Visualforce Pages. The problem only exists with Apex classes. I have reinstalled VS code two or three times to solve this issue. And also tried 'sfdx plugins:install @salesforce/sfdx-diff' command to install the plugin.
But nothing worked for me.Can someone hlep me out to solve this issue if you have gone through this before?