Error de TS para SpeechGrammarList , pero esto es parte de Web Speech API y la interfaz se implementa en "DOM". ¿Por qué TS sigue dando este error?

Código:

 export interface SpeechRecognitionProperties { grammars?: SpeechGrammarList; //TS2304: Cannot find name 'SpeechGrammarList'. lang?: string; }

"typescript": "^4.4.4"

tsconfig:

 { "compilerOptions": { "target": "ESNext", "useDefineForClassFields": true, "lib": ["DOM", "DOM.Iterable", "ESNext"], "allowJs": false, "skipLibCheck": false, "esModuleInterop": false, "allowSyntheticDefaultImports": true, "strict": true, "forceConsistentCasingInFileNames": true, "module": "ESNext", "moduleResolution": "Node", "resolveJsonModule": true, "isolatedModules": true, "noEmit": true, "jsx": "react-jsx" }, "include": ["./src"] }