Register custom query vars and template hierarchy re-write to load a specific template for a post type

functions.php

function prefix_register_query_var( $vars ) {
    $vars[] = 'eb_id';
    $vars[] = 'eb_t';

    return $vars;
}
add_filter( 'query_vars', 'prefix_register_query_var' );

function prefix_url_rewrite_templates() {
    if ( get_query_var( 'eb_id' ) ) {
        add_filter( 'template_include', function() {
            return get_template_directory() . '/events-single.php'; // your template
        });
    }
}
 
add_action( 'template_redirect', 'prefix_url_rewrite_templates' );