If your instance doesn’t have a description, please edit it in your instance settings (It will be the Description field, above the sidebar), and we’ll pick that info up on our next update of join-lemmy
Be aware that lemmy.glasgow.social is a mostly bot instance too.
Yes, you can still manually cache those posts by typing their URLs into the search box.
deleted by creator
You can do the same for comments, or any new comments after that federation connection is made, will recursively grab all the parent comments and parent post.