Post Comments
Renders the WordPress comments template including the comment list and submission form. It is shown in the block inserter as Post Comments and registered as canvas-core/post-comments.
Select the block on a page and its own settings open in the sidebar, in the panels below:
Settings
Each setting is named exactly as the block editor names it, followed by what it does and what it starts as. Where a setting carries a Shown when line, it stays hidden until that condition is met, which is the usual reason a setting looks missing from the sidebar:
Settings
Comment List ClassesDefaultEmpty
Utility classes added to the comment list itself (the holding the thread): its divider or spacing, for example.
Comment Form ClassesDefaultEmpty
Utility classes added to the reply form container (#respond): its spacing under the comment thread, for example.
Related
Every Canvas block also carries the Animation, Scroll Effects and Advanced panels, which are described in Controls every Canvas block has.
Other blocks in Posts: Blog Archive Loop, Blog Loop, Blog Single Post, Post Archive Index, Post Author, Post Content.

