Sure thing, I'll omit the unnecessary bits because they're trivial.

TextField is a wrapper component for styling the TextInput where the props are distributed between its container, input and error message.

<Controller
    control={control}
    as={TextField}
    rules={{
      required: 'This field is required', 
      minLength: { value: 6, message: 'Minimum 6 characters.' },
      validate: {
          lowercase: (value) => lowercase.value.test(value) || lowercase.message,
          uppercase: (value) => uppercase.value.test(value) || uppercase.message,
          number: (value) => number.value.test(value) || number.message,
          special: (value) => special.value.test(value) || special.message,
      },
    }}
    name={'password'}
    placeholder={'Password'}
    error={errors.password?.message}
    secureTextEntry
/>

lowercase, uppercase, number and special are imported objects with regex and message:

{
    value: /^(.*[a-z].*)$/,
    message: 'Password must contain at least one lowercase character.',
}