It depends what you are appealing!
Ideally, before making an edit, you should check on the Talk page for the article (which you can get at by clicking "Talk" near the top of the article - apologies if I'm teaching you to suck eggs here) and see if it has already been discussed. If it has and a consensus has been reached, you should re-open the discussion, politely explaining why you think the topic needs to be revisited. However, once consensus has been reached, you are expected to accept it even if you disagree with it. There is no set mechanism for appealing.
If you don't see a discussion on the Talk page and someone objects to an edit you have made, the accepted approach is to raise the matter on the Talk page and try to reach a consensus with other editors.
If you are threatened with a ban over a single edit, your first step is to remind whoever is threatening you that they are required by Wikipedia to assume you are acting in good faith and that they should discuss the disagreement with you, not threaten a ban. If the editor concerned continues to behave badly, you can report them to the Administrator's Noticeboard, but you should use this cautiously. They don't want every spat between editors to be referred to them. You can find it at Wikipedia:Administrators' noticeboard - Wikipedia.
If you are actually blocked from editing, you put the following text on your User Talk page - that is a page called User_talk:your username:
{{unblock|reason=Your reason here ~~~~}}
This attracts the attention of administrators who can review what has happened and decide whether the block is justified.
Changing the way Wikipedia reports GC and trans issues, however, is a much bigger problem. Right now, it is influenced by the fact the Council of Europe condemned GC and linked it to virulent attacks on the rights of LGBTI individuals, UN Women has described GC as an extreme anti-rights movement that employs hate propaganda and disinformation, and academics have described the GC movement as transphobic and linked it to promotion of disinformation. Personally, I don't think Wikipedia is the place to have this battle. If we shift views elsewhere, I would expect Wikipedia to follow. And it is vital that we shift views in Europe. We don't want the ECHR to overrule the Supreme Court.
If you do have a problem, feel free to rope me in by sending me a PM. I will be happy to advise and may be able to intervene if you are being treated unfairly.