A pattern that demonstrates how block locking can work.

locked pattern example

function register_block_patterns() {

	if ( class_exists( 'WP_Block_Patterns_Registry' ) ) {

                $content = '<!-- wp:cover {"dimRatio":70,"customGradient":"linear-gradient(135deg,rgb(255,255,255) 20%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(253,253,253) 80%)","isDark":false,"align":"full","lock":{"remove":false,"move":true}} -->
<div class="wp-block-cover alignfull is-light"><span aria-hidden="true" class="has-background-dim-70 wp-block-cover__gradient-background has-background-dim has-background-gradient" style="background:linear-gradient(135deg,rgb(255,255,255) 20%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(253,253,253) 80%)"></span><div class="wp-block-cover__inner-container"><!-- wp:heading {"textAlign":"center","style":{"typography":{"lineHeight":"1.2"}},"textColor":"grey","lock":{"remove":true,"move":true}} -->
<h2 class="has-text-align-center has-grey-color has-text-color" id="book-your-next-adventure" style="line-height:1.2">Book your next adventure</h2>
<!-- /wp:heading -->

<!-- wp:buttons {"layout":{"type":"flex","justifyContent":"center","orientation":"horizontal"},"lock":{"remove":true,"move":false}} -->
<div class="wp-block-buttons"><!-- wp:button {"textColor":"white","style":{"border":{"radius":"10px"}},"className":"is-style-outline"} -->
<div class="wp-block-button is-style-outline"><a class="wp-block-button__link has-white-color has-text-color" href="#0" style="border-radius:10px">Find yours</a></div>
<!-- /wp:button --></div>
<!-- /wp:buttons --></div></div>
<!-- wp:paragraph {"align":"center","style":{"typography":{"fontStyle":"italic","fontWeight":"200"}},"textColor":"grey","lock":{"remove":false,"move":true}} -->
<p class="has-text-align-center has-grey-color has-text-color" style="font-style:italic;font-weight:200">Create moments you will remember forever</p>
<!-- /wp:paragraph -->
<!-- /wp:cover -->';

		register_block_pattern(
			'custompattern/call-to-action-adventure',
			array(
				'title'         => __( 'Call to Adventure', 'textdomain' ),
				'description'   => _x( 'A call to adventure.', 'Block pattern description', 'textdomain' ),
				'content'       => trim($content),
				'categories'    => array( 'buttons' ),
				'keywords'      => array( 'cta' ),
                                'viewportWidth' => 1400,
                                'blockTypes'    => array( 'core/buttons' ),
			)
		);

	}

}
add_action( 'init', 'register_block_patterns' );