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 have searched for related issues and found none that matched my issue.
• I have read the FAQ and my problem is not listed.

Playground Link

https://typescript-eslint.io/play/#ts=5.7.2&fileType=.tsx&code=CYUwxgNghgTiAEYD2A7AzgF3hkmCMAXPABQCU8AvAHzwBGSSEIUKA3AFCiSwLLpY5MAJiJlKNAK4oA1iiQB3Np3DQ4iVJmy4MAZiIAeACpUx1eIY5dVvDQO0AWA4fggAHjhTA0dBkxYnyMwt2dgB6UPgAByg0NFx2AG08ABp4FAkICABdADoAMwBLCBwYYkEMPFIOMIjo2Pik1PTM3MLikFLyoSqQ8Pg0AAskDOAomLRElLSM7PyikrLtHR6a-qGRsdjJppnW%2BY7FzHseoA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6Jge1tiacTJTIAhtEK0yHJgBNK%2BSpPRRE0aB2iRwYAL4gtQA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

declare const test1: () => boolean;
declare const test2: () => unknown;
declare const test3: <T>() => T;
declare const test4: <T extends boolean>() => T;

// passes
[1, null].filter(test1);

// passes
[1, null].filter(test2);

// should pass
[1, null].filter(test3);

// should pass
[1, null].filter(test4);

ESLint Config

module.exports = {
  parser: "@typescript-eslint/parser",
  rules: {
    "@typescript-eslint/no-unnecessary-condition": "error"
  },
};

tsconfig

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

Expected Result

I expect all use-cases to be consistent and not report as errors.

Actual Result

The use-cases with a type constraint report (unnecessarily) as an error.

Additional Info

This seems similar to #10311 and looks like the fix should be similar.