Repro

{
  "rules": {
    "no-extra-parens": 0, 
    "@typescript-eslint/no-extra-parens": 2
  }
}

// type of requestInit is native RequestInit from lib.dom.d.ts
let cookies = (<Headers> requestInit.headers).get('Cookie')

Expected Result
No error

Actual Result
Got error Unnecessary parentheses around expression.eslint(@typescript-eslint/no-extra-parens)
and be changed to below if run eslint --fix

let cookies = <Headers> requestInit.headers.get('Cookie')

Additional Info

Versions