Firestore Timestamp not being recognized as such in the console

I have a script which loads some data into Firestore from a excel sheet. For each entry that is loaded in, I want to add two fields, dateAdded and dateModified.

const service:Service = {
   name: data.PROFISSIONAL,
   description: data.DESCRICAO,
   category: data.CLASSIFICACAO,
   cellphones,
   phones,
   reviews: reviews,
   numReviews: reviews.length,
   excluded: data.EXCLUIDO === 'SIM',
   instagram: data.INSTAGRAM,
   location: data.LOCAL,
   dateAdded: Timestamp.now(),
   dateModified: Timestamp.now(),
   tags: getTags(data.CLASSIFICACAO)
};

I have a intermediate step which saves an array of these services to a json object. The data then gets uploaded to firestore:

const jsonToFirestore = async () => {
  console.log(`Uploading table`)

  try {
    console.log('Initializing Firebase');
    initializeApp(serviceAccount);
    console.log('Firebase Initialized');

    await restore('./data/services.json');
    console.log('Upload Success');
  }
  catch (error) {
    console.log(error);
  }
};

When I look in the Firebase console though, the date fields have not been recognized as Timestamps.

Is there any way for them to be recognized? Like this for example:

I appreciate any help provided.