Good job! I wonder why some of these are missing from fediverse.observer. There is an add instance page, and entering for example aussie.zone says it already exists, but the search doesnt find it. Lemmy.cafe, fosscad.io are included in the statistics (file instances/full.json.gz in the git repo), but not currently shown on the website.
Thanks to your comment I realized that we are only showing instances with registration application on the official site, as there was concern that others would be overrun by spam bots. I had a look at it now, and instances with captcha are actually fine. Here you can see all that are newly listed on joinlemmy.
The instance list is sorted by monthly active users with slight randomization. As these instances you mention are among the larger ones, it is expected that they show near the top. Is there a better sort method that you would suggest?









No you cannot post to a multi-community, they are only for browsing/viewing.