what function can I use to automatically output og tags per page/post?

This is an example how to add some OG tags for Facebook:

Create a hook to a function on the wp_head action,

// if on a single post screen, generate and insert facebook:OG tags. ##
add_action( 'wp_head', 'wpse381199_og_tags', 12 );     

Then create a function to generate the OG tags

    function wpse381199_og_tags(){
        
        // get the current post object ##
        $the_post   = get_post();

        // bulk if no post 
        if ( ! $the_post ){ return false; }

        // check we are on a single post or page, if not bulk ##
        if ( 
            ! \is_single()
            && ! \is_page()
        ) { 
        
            return false; 
        
        }

        // get all the data we need. ##
        $array = [];
        $array['title'] = $the_post->post_title;


        // add all other tag elements you want to array here and add a new tag for each value in the HTML below.

?>
        <meta property="og:title" content="<?php echo ( \esc_html( $array['title'] ) ); ?>" />
<?

    }