Dynamic Options Not Available

Hello - I am creating a block element (post template - block) and am not getting the ability to insert dynamic options (in this case post title) when inserting a heading. All the other "standard" items are available (alignment, weight, link, etc.). I have an active GP Premium license and the plugin/theme are up to date per the pre-check and all caching within wordpress and hosting account (siteground) have been flushed/disabled.

Screenshot:
https://drive.google.com/file/d/1nr-S-wlG-SZlzKcxS6e6pzwkiJjvA-_6/view?usp=sharing