Hi Digital,
Thanks for details.
1. You are using a Custom Single Product layout, which is built with WoodMart WooCommerce builder. Navigate to Layouts > Layout to edit Archive product layouts and you can remove the Page Title
widget https://ibb.co/1Z84gf7
Further, you can read more about the Layout Builder here: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/
2. How to add mail folder icon In the top header, like telephone icon.
Navigate to WoodMart > Header builder > edit default header (highlighted star icon) or you can go through admin bar directly https://prnt.sc/Ct9ehRDvvDV9.
Hover on Information box
element, click on Pencil icon to edit and you can upload image https://ibb.co/LgV9L74
Please refer to this article https://xtemos.com/docs-topic/adding-menu-to-the-site/
3. Please navigate to Theme Settings > Performance > Font & Icons and set the “swap” value for the “font-display” for text fonts
field: https://take.ms/vwNDA
4. This is how filters work, when you select one attributes, it can only displays products that have other attributes.
Regards,