LLMS_Blocks_Migrate::check_sales_page()
Method: Don’t remove core template actions when a sales page is enabled and the page is restricted.
Source: libraries/lifterlms-blocks/includes/class-llms-blocks-migrate.php:73
llms_blocks_is_post_migrated()
Function: Determine if a post is migrated
Source: libraries/lifterlms-blocks/includes/functions-llms-blocks.php:55