"declare class" in a global is not visible in external files about typescript HOT 7 CLOSED

declare global {
    namespace globalThis {
        class WorldClass {
            constructor();
            important: number;
        }
        export { WorldClass }
    }
}

const w = new global.WorldClass(); // OK

/**
 * The URL interface represents an object providing static methods used for creating object URLs.
 *
 * [MDN Reference](https://developer.mozilla.org/docs/Web/API/URL)
 */
interface URL {
    hash: string;
    host: string;
    hostname: string;
    href: string;
    toString(): string;
    readonly origin: string;
    password: string;
    pathname: string;
    port: string;
    protocol: string;
    search: string;
    readonly searchParams: URLSearchParams;
    username: string;
    toJSON(): string;
}

declare var URL: {
    prototype: URL;
    new(url: string | URL, base?: string | URL): URL;
    canParse(url: string | URL, base?: string): boolean;
    createObjectURL(obj: Blob | MediaSource): string;
    revokeObjectURL(url: string): void;
};

<script>
class Foo {}
console.log(Foo);  // [class Foo]
console.log(globalThis.Foo);  // undefined
</script>