This FREE plugin from @DalkMania adds all registered metaboxes using http://MetaBox.io to the WPGraphQL Schema.
WPGraphQL MB (MetaBox)
Published by Jason Bahl
Jason is a Principal Software Engineer at WP Engine based in Denver, CO where he maintains WPGraphQL. When he's not writing code or evangelizing about GraphQL to the world, he enjoys escaping from escape rooms, playing soccer, board games and Fortnite. View more posts