You can access it by creating a new block element, then select Content Template under the Element type dropdown menu:
Import a template.
Select the tag names to apply to the content template.
Set the condition which the content template is applied to.
Keep default post container
Keep the default post container so that styles such as content padding set in the customizer would apply.
GenerateBlocks Container Settings
Inline post meta items
Inline the items inside this container. This is useful when adding dynamic data items such as author, post date, categories etc.
Set the alignment of the inline post meta items.