Gutenberg Templates allows to build dynamic templates with custom fields and taxonomy and assign them to any content type in WordPress.
The templates will work like PHP templates. You design them once and they automatically apply to all items of a post type. When you edit a template, changes apply immediately to all the items that use that template.
Any item can opt-out of the post type template application at any time using a meta box control on the item edit page.
Screenshots
Editing a template and adding the Gutenberg Templates post content block.
A rich template design.
Assigning the template to a post type.
Editing a template not assigned to any post type, targetted to be applied on a certain item.
Editing an item that the post type of which already has a template assignment.
The frontend view of an item with a template assigned.
The opt-out message.
The frontend view of the opted-out item.