How to search archive only

Hi there,

I am using ACF to search custom field types as follows:-

// Search Functionality // --https://distinct.dev/jobs/?job_sector=Finance&job_type=Permanent

// array of filters (field key => field name)
$GLOBALS['my_query_filters'] = array(
	'field_1'	=> 'job_sector',
	'field_2'	=> 'job_type',
	'field_3'	=> 'job_location',
	'field_4'	=> 'job_salary_from',
	'field_5'	=> 'job_salary_to'
);

// action
add_action('pre_get_posts', 'my_pre_get_posts', 10, 1);

function my_pre_get_posts( $query ) {

	// bail early if is in admin
	if( is_admin() ) {

		return;

	}

	// get meta query
	$meta_query = $query->get('meta_query');

	// loop over filters
	foreach( $GLOBALS['my_query_filters'] as $key => $name ) {

		// continue if not found in url
		if( empty($_GET[ $name ]) ) {
			continue;
		}

		// get the value for this filter
		// eg: https://www.website.com/events?city=melbourne,sydney
		$value = explode(',', $_GET[ $name ]);

		// append meta query
    	$meta_query[] = array(
            'key'		=> $name,
            'value'		=> $value,
            'compare'	=> 'IN',
        );

	} 

	// update meta query
	$query->set('meta_query', $meta_query);

}

I want to also be able to search by a keyword, I’ve tried with the ‘s’ parameter but this then changes the template that is used and shows me blog posts as well when I am wanted to show just archive posts.

Is there a way I can achieve what I am wanting?