Note: Some plugins are not yet compatible with PHP 8 or WP 5.7 and are therefore deactivated
Worried whether external links, maybe repeated in the footer like on this site, could be considered as link scheme by search engines? Well you could make it a
nofollow link manually – or – let WP External Links take care of it automatically. The plugin is highly configurable and does not appear to have any measurable performance hit.
Extract from WordPress.org
Manage all external & internal links on your site. Control icons, nofollow, noopener, ugc (User Generated Content), sponsored and if links open in new window or new tab.https://wordpress.org/plugins/wp-external-links