Do some FCC forum threads not allow replies?

I was browsing freeCodeCamp Challenge Guide: Invert SVG Elements and can’t seem to find a way to reply with the solution (since there isn’t one yet).

Do some threads not let you reply, or am I just not seeing it? Thanks!

The Guide threads do not allow responses. If you would like to contribute, you can suggest a solution on freeCodeCamp’s GitHub.