I would do this instead:

  type MyEnum = {
    active: 0;
    inactive: 1;
  }

  const MyEnum: MyEnum = {
    active: 0, 
    inactive: 1,
  }

  const showAge = MyEnum.active;
  const showPets = MyEnum.inactive;

It's slightly more duplication, but a lot more readable (imo) to those unfamiliar to utility types. TypeScript also enforces keeping them in sync.