FSE Pro Plugin not showing anything

Dear officials, I have installed FSE pro plugin and activated it on a child site of a multisite setup WP v6.4.3. I make sure the plugin is network activated (or not, does not change anything) and activated on the child site. Nothing is added to the site editor, all I have in the patterns are 18 catch FSE patterns. I believe they are all free patterns, not pro patterns. How can I fix this? Thanks for any help! Best, Yi