TypeScript: Return Type of Exported Function "but cannot be named"

import { Effect as E, Context } from "effect"

export namespace _typesTest {
  export function a<K extends string>(name: K) {
    return class CoA extends ViewModel.Component(name)<CoA, {}>() {};
  }
}

export namespace ViewModel {
  export const Component =
    <const Id extends string>(id: Id) =>
    <Self, Type extends E.Tag.AllowedType>(): ComponentClass<
      Self,
      Id,
      Type & { _dev?: unknown }
    > =>
      Object.assign(E.Tag(id)<Self, Readonly<Type & { _dev?: unknown }>>(), {
        getComponentMaybe: (entity: Record<string, any>) => entity[id],
        getComponent: (entity: Record<Id, Type>) => entity[id],
        key: id,
      });

  export type ComponentClass<
    Self,
    Id extends string,
    Type extends E.Tag.AllowedType,
  > = Context.TagClass<Self, Id, Type> & {
    getComponentMaybe: (entity: Record<string, any>) => Type | undefined;
    getComponent: (entity: Record<Id, Type>) => Type;
    key: Id;
  };
}