Filter

1. From your Shopify admin, go to Apps.

2. Type to find "Search & Discovery" app of Shopify

OR go to Navigation -> Add App like the below image:

1. Open App -> Click Customize Filters.

1. Click Add Filter.

1. Choose option filter you want to set up.

If your product collection contains over 5000 products, then filters are hidden. For more information, see Add storefront filtering.

If you used storefront filters prior to August 16, 2022, the settings to manage your saved filters moved to the Shopify Search & Discovery app. - The app has been preinstalled to your admin, so you can continue to edit your filters.

- The app will not impact your store’s performance.

=> If you want to get more information, please visit the link