facetwp display facetwp pager in GeneratePress

functions.php

<?php

/**
 ** substitute facetwp pager in GeneratePress v. 2.1.2
 ** change `is_home()` conditional as needed to target facetwp filter pages
 **/

if ( ! function_exists( 'generate_content_nav' ) ) {
	/**
	 * Display navigation to next/previous pages when applicable.
	 *
	 * @since 0.1
	 *
	 * @param string $nav_id The id of our navigation.
	 */
	function generate_content_nav( $nav_id ) {
		if ( ! apply_filters( 'generate_show_post_navigation', true ) ) {
			return;
		}

		if ( is_home() && function_exists( 'facetwp_display' ) ) { // display facetwp pager
		    /** change `is_home()` conditional to target pages where facetwp pager is needed  */
		    ?>

		    <nav id="<?php echo esc_attr( $nav_id ); ?>" class="paging-navigation">
                <span class="screen-reader-text"><?php esc_html_e( 'Post navigation', 'generatepress' ); ?></span>

			        <?php echo facetwp_display( 'pager' ); ?>

         </nav>

		<?php } else {

			global $wp_query, $post;

			// Don't print empty markup on single pages if there's nowhere to navigate.
			if ( is_single() ) {
				$previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true );
				$next = get_adjacent_post( false, '', false );

				if ( ! $next && ! $previous ) {
					return;
				}
			}

			// Don't print empty markup in archives if there's only one page.
			if ( $wp_query->max_num_pages < 2 && ( is_home() || is_archive() || is_search() ) ) {
				return;
			}

			$nav_class = ( is_single() ) ? 'post-navigation' : 'paging-navigation';
			$category_specific = apply_filters( 'generate_category_post_navigation', false );
			?>
            <nav id="<?php echo esc_attr( $nav_id ); ?>" class="<?php echo esc_attr( $nav_class ); ?>">
                <span class="screen-reader-text"><?php esc_html_e( 'Post navigation', 'generatepress' ); ?></span>

				<?php if ( is_single() ) : // navigation links for single posts.

					previous_post_link( '<div class="nav-previous"><span class="prev" title="' . esc_attr__( 'Previous', 'generatepress' ) . '">%link</span></div>', '%title', $category_specific );
					next_post_link( '<div class="nav-next"><span class="next" title="' . esc_attr__( 'Next', 'generatepress' ) . '">%link</span></div>', '%title', $category_specific );

                elseif ( is_home() || is_archive() || is_search() ) : // navigation links for home, archive, and search pages.

					if ( get_next_posts_link() ) : ?>
                        <div class="nav-previous"><span class="prev" title="<?php esc_attr_e( 'Previous', 'generatepress' );?>"><?php next_posts_link( __( 'Older posts', 'generatepress' ) ); ?></span></div>
					<?php endif;

					if ( get_previous_posts_link() ) : ?>
                        <div class="nav-next"><span class="next" title="<?php esc_attr_e( 'Next', 'generatepress' );?>"><?php previous_posts_link( __( 'Newer posts', 'generatepress' ) ); ?></span></div>
					<?php endif;

					if ( function_exists( 'the_posts_pagination' ) ) {
						the_posts_pagination( array(
							'mid_size' => apply_filters( 'generate_pagination_mid_size', 1 ),
							'prev_text' => apply_filters( 'generate_previous_link_text', __( '&larr; Previous', 'generatepress' ) ),
							'next_text' => apply_filters( 'generate_next_link_text', __( 'Next &rarr;', 'generatepress' ) ),
						) );
					}

					/**
					 * generate_paging_navigation hook.
					 *
					 * @since 0.1
					 */
					do_action( 'generate_paging_navigation' );

				endif; ?>
            </nav><!-- #<?php echo esc_html( $nav_id ); ?> -->
			<?php

		}
	}
}