I am not sure all of this needs to be (duplicated?) on the wiki: https://lazarus-ccr.sourceforge.io/docs/lcl/forms/tform.html
Indeed! For standard controls, properties, methods and events the wiki should serve to expand on and clarify the documentation as well as to procure examples of use, preferibly taken from real life applications. Simply duplicating the docs in the wiki is worst than lost effort: it's wasting effort that should have gone directly to the docs.
For example, those page on "key press/down"? Almost worthless as they are: There should be instead a page summing up and refining the information, including examples, about key event handling. Something like the page:
LCL Key handling but from the application's point of view.
Fact is the wiki, in general, needs a serious, conscientious overhaul. All efforts are welcome, of course, but please:
think before editing.