Where to Add JSON-LD Schema Markup Code in Shopify Theme?

{
  "@context": "https://schema.org",
  "@type": "Store",
  "name": "Mosami",
  "url": "https://mosami.in",
  "priceRange": "₹₹₹",
  "image": "https://mosami.in/images/store-image.jpg",
  "telephone": "+91-9078529969",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "BTM Layout 1st stage",
    "addressLocality": "Bangalore",
    "addressRegion": "Karnataka",
    "postalCode": "567001",
    "addressCountry": "IN"
  },
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.6",
    "reviewCount": "2000"
  },
  "returnPolicy": {
    "@type": "MerchantReturnPolicy",
    "name": "7 Days Return",
    "url": "https://mosami.in/pages/refund-policy"
  }
}

1. Tested the JSON-LD code independently: When pasting the JSON-LD directly, Google's tool validates it and recognizes rich results.

2. Added the code to the Shopify theme: I tried pasting it in the theme.liquid file under the Layout folder, before the closing tag. Also added it in the homepage template file index.liquid under Templates. Created a custom section with the code and added it to theme.liquid using {% section 'json-ld-schema' %}.

3. After making these changes, I tested my website URL in Google's Rich Results Test tool, but it doesn't detect any structured data.

I expected:

1. I expected the JSON-LD code to be embedded successfully into my Shopify store, so that:

2. Google's Rich Results Test tool detects rich results when testing my store's URL. Rich snippets for ratings and return policies appear in Google search results for my store.