You can create a new collection with the filtered products. Like first of all filter the products by tags using the code you provided and assign the filtered products to a new variable, such as "filtered_products." So, now you can paginate through th...

Issue may be due to misconfigured links or a mobile specific theme setting. I think you should first check that the buttons on the mobile version of your site have the correct URLs. Go to your theme editor, switch to the mobile view, and verify each ...