After you created a template inside fullsite editor,
you can go to your pages dashboard, edit a page, and under the Template panel, you can choose any custom template you’ve made.
https://prnt.sc/FB4k80Wc-vST
If it’s empty, then it doesn’t have custom templates and only have default templates, default templates cannot be selected inside pages, as they usually auto assigned based on their names. Those defaults templates are :
– Index : the base landing template.
– Front Page : your home landing template.
– Page : your pages template.
– Single Post : your posts template.
– Archive : your archive template for category, tags, dates, etc.
– Search : your search page template.
– 404 : your not found page template.