We'll create fresh WordPress site with Block Logic – Full Gutenberg Block Display Control installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Block Logic adds a “Block Logic” field to the “Advanced” section of the block editor (i.e Gutenberg), that lets you show or hide any block based on conditions. You can use WordPress’ Conditional Tags or any general PHP code.
Does not work with the Classic Block, Widget Block or Widget Area Block [‘core/freeform’, ‘core/legacy-widget’, ‘core/widget-area’], as the those blocks do not support block attributes. Does also not work with the HTML Block [‘core/html’] inside the Widget Screen, as this one also does not support block attributes there.
Just activate the plugin. The “Block Logic” textbox will then appear in the “Advanced” section of the Gutenberg editor.