How to Astra Auto Attach Pictures

I'm using the Astra theme for WordPress and building the page through the Gutenberg editor.

Currently I have a problem: on the home page there is an image that comes automatically with Astra, I'm not sure if it's called a "Banner" or a "Hero Image", but it's the big image that loads at the top of the page. I'd like to replace it with my own, but I can't find where to change it.

May I ask where this image is set? Is it through the theme settings, the page cover image, or one of the blocks? Is there a detailed tutorial to guide me through this?