If I go to other mastodon servers like mstdn.ca my profile shows basically nothing except some replies despite claiming I have 182 posts. Adding up threads, comments, microblog posts, and replies for my account gives 185 before posting this, so not far off in number.
this is an activitypub thing in general and not specific to kbin. if nobody is following you from that instance your posts won't get sent to that instance (as there's no real point!)
the posts of yours that do get sent there are likely there because you commented on a group that someone had been following.
ps: hey @ernest, attempting to view a comment on it's remote instance (https://kbin.social/m/kbinDevlog/t/642285/-/comment/3689397 for example) redirects me to the login page, whereas doing so on the first post on the thread itself works fine.
is this a known issue? it's a bit inconvenient when following kbin content outside kbin (want to make sure i'm not missing any replies and writing the same thing someone already did, which happens fairly often on single user instances such as mine)