How to hide fields (title, category, tag input) when creating a new topic with openNewTopic

I have attempted this, yet unfortunately, it remains concealed in every aspect. Consequently, when I wish to edit the topic, the categories and tags are not visible. Ideally, I would like to know the functions that allow me to define these elements when opening the “composer.” This way, I could select what appears within the section that launches the “composer.” I believe there is no straightforward solution to this; I will contemplate it further.