Hello and welcome to the community.
But I think I speak for all of us when I say, that it is not entirely clear what you are trying to tell us.
F-Droid is about FOSS (Free and Open Source Software). Software that everyone can use, share and edit any way they see fit (see The Open Source Definition (Annotated) – Open Source Initiative)
F-Droid is not a place to ask for (or share) cracks for proprietary apps. So we can’t and won’t help you there.
However, people “crack” proprietary apps for many reasons, including not being able to afford them. In which case, we can help, because we have a free alternative to Minecraft in F-Droid: Minetest
Sure, it’s not exactly the same, but if your goal is to have a free Minecraft-like game that anyone can modify, this is what we have for you. If you want to just have a crack for Minecraft, nothing else, sorry, but F-Droid is not the place for that