Bug: [explicit-function-return-type] false positive on defaulting parameters

[kirkwaiblinger]

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=5.4.3&fileType=.ts&code=C4TwDgpgBAwghgGwQITgYwNZQLxQBQCUOAfFAG4D2AlgCYDcAUAwGYCuAdmsFRe1M3gDmFYGgAWcAFyxEKdFlyESUAN5QAvgWmVaqpuqA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-AWhXkoDt8B6RAD2MbMroDNYTMvkoB7JrWiJ8saJKKl0URNGhjokcGAC%2BIHUA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eFYDAruuGAL4g9A&tokens=false

Repro Code

type CallBack = () => void;

function f(gotcha: CallBack = () => { }): void {

}

ESLint Config

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

tsconfig

{
  "compilerOptions": {
    "strict": true
  }
}

Expected Result

I expect no error since CallBack makes it a typed function expression

Actual Result

"Missing return type on function":

function f(gotcha: CallBack = () => { }): void {
                                 ^^

Additional Info

No response