I found this bookmarklet somewhere else, and it's super handy. You simply click the bookmark when you are on the lemmy community page, and it'll send you to a beehaw page where you can subscribe to it directly:
javascript:(function() { const home = 'beehaw.org'; /*replace this with your local instance's host name */ const url = window.location.href; let community = url.split('/c/')[1]; if( !community.includes('@') ) { community += '@' + url.split('/')[2]; } if( community.endsWith( '@' + home ) ) { community = community.substring(0, community.length - 1 - home.length); } window.location.href = 'https://' + home + '/c/' + community; })();