After selecting the manufacturing template in the community creation wizard, which tool can be used...

Experience Builder is the tool that can be used to customize the site after selecting the manufacturing template in the community creation wizard. Experience Builder is a point-and-click tool that lets you create pixel-perfect, responsive, and dynamic digital experiences for your customers, partners, and employees. You can use Experience Builder to customize the layout, branding, navigation, components, pages, and permissions of your site. You can also preview and publish your changes, and monitor the performance and usage of your site. References: Create the Manufacturing Partner Template and Add Partner Users - Salesforce, Create an LWR Site in Experience Cloud - Salesforce Developers, Experience Builder - Salesforce Help