I can get the post type, but when it hits return none of my blocks work.
I get this message on all of the blocks:
Your site doesn’t include support for the "meta-box/my-block" block. You can leave this block intact or remove it entirely.
The code helps you to disable one custom block on the specific post type, understand that is enabled by default if you do not add the condition. See my screen record https://share.getcloudapp.com/L1udYD40.