Help {% For T In Product.Tags %}

[magalivegas]

Hi there !

I have a question about the following code. 
 
I would like to add at the bottom of each pages (pages corresponding to brand "size guides" pages like https://circularclothingparis.com/pages/guide-des-tailles-sezane or https://circularclothingparis.com/pages/guide-des-tailles- ba-sh etc etc etc) the collection of products of this brand (in this case Sézane or Ba&sh here for example).

 I tried with page_title :

{%- for product in collections.all.products -%}
{% for t in product.tags %}
{% if t contains page_title %}

It does not work. Do you know what can be used to link a brand TAG to a brand page?
 
Thanks in advance

Magali