In reply to Jeff Chandler.

Exactly - you have to convert it to a regular block ! Also, even though Reusable Blocks are CPTs as you mentioned they are not available for exporting from the tools menu. You can only export one Reusable Block at a time, which is pain if you have dozens of them. The mass export functionality was there with the Gutenberg Plugin used with WP 4.9x. When WP 5.0 came around, this disappeared. I reported the issue on Slack and whoever responded, were surprise that exporting from the tools menu is not available. That was in December, here we are 6 months later, and nothing is done...

It's ok though, someone created the plugin "fabrica-reusable-block-instances" which not only gives you the option to export all Reusable Blocks at once, but also, it shows you where each Reusable Block is been used, which is very useful, especially when you are deleting those blocks...

Anyone suggesting to include these 2 functionalities to the core will be total waste of time and frustration...