If you are creating many worlds and do not want to lose the most interesting ones, then just install the Cherished Worlds mod, which is now available for the Fabric loader. It will add only one function: you can mark any world as a favorite and it will always be displayed at the top of the list, and will also receive a noticeable asterisk mark. You can also download the Forge version of the mod.
How to install Cherished Worlds mod
- Make sure you have installed Fabric Mod Loader and Fabric API.
- Download the mod for your version of the game.
- Put it in the ‘mods’ folder, which is located in the game folder.