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=5.8.2&fileType=.ts&code=GYVwdgxgLglg9mABMMAeAggJ0wQwJ6ICmAHlIWACYDOimhOFCANgeANZhwDuYA2gLoA%2BABQ5s%2BAFyIsuPAEpEAbwCwAKES1CUEJiRjZAbjUBfI6qA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6AQ2mncNqNPRREXAPbRI4MAF8QUoA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

Repro Code

function fn<Array extends readonly unknown[]>(array: Array) {
  return array;
};

ESLint Config

module.exports = {
  "rules": {
    "@typescript-eslint/array-type": "error"
  }
}

tsconfig

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

Expected Result

No errors.

Actual Result

Error on the generic type parameter.

Additional Info

No response