How can I redirect a valid URL to another on my website?

[styl]

Looking to redirect this URL:

 https://stylcase.com/collections/iphone/

To this URL: 

 https://stylcase.com/collections/iphone/iphone-13

But because it's a valid URL Shopify won't do it, anyone know a workaround?

[LitCommerce · Accepted solution]

Hi @styl,

Please go to main-collection-product-grid.liquid file and add code here:

Code:

{% if collection.handle == 'iphone' and current_tags == blank %}
  <script>
    window.location.href = '{{ collection.url }}/iphone-13';
  </script>
{% endif %}

Hope it helps!

[styl]

Perfect thank you!