Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I havesearched for related issues and found none that matched my issue.
• I haveread the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6ZAd0vzIAt6AHrwCGsZPkoA3RExTJafRGQDW6MAG1w2HImjQA9tEgAaLdqzbskMvqbJKAE10ARRADNR8fAFEho8VKIAGKGAKpMlLaoGPhwiGbYAL4JALpayYlAA&code=CYUwxgNghgTiAEYD2A7AzgF3hAlhkMUEAXPAORRnwA%2B5ARmQNwBQzaA7nmABbwAUufIQgBKeAG9m8RFDQIKZYlOnw6cKAGsW00ADMoAVwgYlK1eq3MAvkA&fileType=.ts

Repro Code

declareconstliteral:'a'|'b';switch(literal){case'a':break;default:break;}

ESLint Config

module.exports={"rules":{"@typescript-eslint/switch-exhaustiveness-check":["error",{"considerDefaultExhaustiveForUnions":true}]}}

tsconfig

{"compilerOptions": {"strictNullChecks":true  }}

Expected Result

no error

Actual Result

error

Additional Info

This went through several renames in#9954 and I guess we merged it backwards