How To Auto Insert Disclosures On WordPress Posts - Tech Addressed
How to Add Content Before or After Post Content or Custom Post Type
2949 (When 'the_content' filter applied and bbpress shortcode added to Admin Editor of Wordpress post, bbPress un-registers (or prevents WP from registering) the dashicons, and the editor.min.css stylesheet) – bbPress Trac
Output hooked to the_content is output after template parts in Block Based Themes · Issue #20342 · WordPress/gutenberg · GitHub