FCRM GB block version?

Can anyone confirm if the FCRM Gutenberg editor is using V3 blocks? I have a tool that unregisters V1-2 blocks in GB so the Iframe-based editor can work correctly, but I don’t want to lose FCRM blocks (conditionals, etc).

This provides some context:

https://snippetnest.com/snippet/legacy-wp-blocks-preventing-iframe-block-editor/