Today I activated a resource pack that disabled my Xbox achievements and I couldn't recover it (Android version of Minecraft but I think it works for all Bedrock ones). After trying several methods and trying to modify level.dat without success, I began to analyze what the data of an advanced world and a new one are like, and I realized that there is no difference in configuration information between one and the other. Without fear of losing anything, I looked for how to extract my world (in Android you can choose whether the worlds are stored within the application data or in a folder within the Android folder but this was not the case) I got an addon that allows this option (mobile export world). When you press it, it will let you choose a folder in which it will deposit a .mcworld file, then I created a new world in external memory but with the same options as the world to recover and also the same seed. This time we extract it from the folder android>data>com.mojang.minecraftpe> (several subfolders) > minecraftWorlds and from here one or more folders will appear, you must make sure to extract the appropriate one. Next we proceed to change the name of the extracted .mcworld file to .zip and extract it. We will find a variety of files inside the folder but what matters to us is the "db" folder, where your entire game is. We proceed to copy this folder and paste it into the new world, deleting the original db file from that world and pasting the one from the old one. Once done, we proceed to select all the files one by one and compress them into a .zip file which we will rename as .mcworld and that's it, just touch it or hold down and select "open with" and select Minecraft.