At the bottom of my posts, the reply text box is not interactive: clicking on it does not allow typing text, and there’s no blinking cursor (or similar) as you’d get with other text boxes. The “Post” bottom doesn’t seem to do anything either.
Why is the first question (I guess I broke it somehow with my theme, but where?)
And can I remove it/play with it somewhere inside Microblog?
To reply on Micro.blog, commenters need to sign in with their Micro.blog, Mastodon, or Bluesky account. Once signed in, the reply text box should become active.
Ah… duh, I guess I forgot.
Is there a way to change the text there perhaps, so it explains it better? Or perhaps a way to turn off the box so it only shows after someone signs in?
Thanks 
There isn’t a built-in setting for changes like that, but you can make modifications if you know JavaScript. The comment feature is handled by conversation.js, so you could either patch that script or build your own solution from scratch.