Cannot find the ‘ERE Shortcodes’ in the editor

I would like to generate a page with a ‘search section’ on top of the ‘results section’. Something easy.

I suppose I should put the ‘ERE advanced search’ on the top block, and the ‘ERE shortcode>proprieties’ on the bottom.

Though I cannot find the ‘ERE shortcodes’, I am using Astra as theme, and activating or deactivating Elementor doesn’t change a thing.

May I ask you some help?

Thank you