The manifest isn’t showing either, but confusingly the PIO Registry knows where it lives, since when I hit the ‘edit’ button it opens up on GitLab. I noticed your NMEAParser library is in the same state. Nothing jumps out as being wrong though.
btw, Any chance you can add a screenshot of what something like SimpleTest looks like to the readme for that library? I was just looking at it, and it would be nice to get and idea of what the fuss is all about. i.e. Why would I want to use it?