Add excerpt and post thumbnail to Buddypress blog directory page [closed]

I don’t have a complete answer for you.
But I can point out that you should use the filter hook provided in the function bp_blog_latest_post()

So something like:

add_filter('bp_get_blog_latest_post', 'your_function', 1);
function your_function(  ) { 
   global $blogs_template;

   $str = // build your string to include excerpt and thumbnail

   return $str;
}

I don’t recall if bp_blog_latest_post() is called anywhere other than the blog directory page – if it is, then this approach will change that too.