How to insert a product filter on the main product page

Hello.

I am using theme Focal.

Please tell me how to insert a product filter on the main product page (collection/all)?

Also, I can’t access this page through customization.

Thanks!

EDIT:

I half understood what the problem was. filter for collection/all is empty. Because of this line

{%- if section.settings.show_filters and collection.filters != empty -%}

and if I remove the condition collection.filters != empty, then the filter appears, but the filter is EMPTY. Why is there an empty filter for collection/all, and how can I fix this?

Something like the basics

https://shopify.dev/themes/navigation-search/filtering/tag-filtering

Thanks, but that doesn’t help. I know this is done in section main-collection.liquid, and I even know what code the filter has, and this filter is listed in this section, but I don’t understand why this filter is not rendered on collections/all. On the rest of the pages of the collection, the filter is rendered.

Hello,

This goes a little more than that - if the person could fix it alone he would never ask here.

Anyways no one wants to do free learning.

Take care with Shopify,

You said in product page, now in collection page,

These are 2 quite different sets of data in terms of Shopify objects (and so database).

Some are accessible everywhere, some other not (shopify.dev).

collections/all is the default page that lists all items. I guess the default filter would not work correctly on this page or you need to create /all collection. There is an easy way to insert filters to any page, add a filter app like https://apps.shopify.com/ultimate-search-and-filter-1. It helps you add many filter types to any page including collection, search page, etc.