Link to affected site: https://help.minecraft.net/hc/en-us/articles/4409165790605
"Where can I find my Bedrock world files?" is missing procedures for backing up / transferring worlds on iOS / iPadOS (and Android), despite them having their file managers pre-installed as a new device. (Although I don't have an Android device, I can list a procedure on iOS / iPadOS.)
Here's my way to access Minecraft Bedrock World files on iOS / iPadOS via Files app:
On the home screen, search for Files (if installed) and open it
Click / tap "My iPhone" / "My iPad"
Click / tap "Minecraft"
Click / tap "games"
Click / tap "com.mojang"
Here, you can backup / transfer not just worlds (MinecraftWorlds), but also imported contents that can't be restored through Minecraft Marketplace ("behavior_packs" for imported behavior packs, "resource_packs" for imported resource packs, another two in same names but with "development_" before are obviously for development, "skin_packs" for imported skin packs and "world_templates" for imported world templates)
Comments 3
@unknown, But the Files app build-in on iOS and current version (Minecraft Bedorck Release 1.20.81) of the game proved me otherwise, I could still locate the Worlds, and make back-ups of them.
Unless you are using an Android device, even so, you could perform a file transfer (based of Method 1b of "Minecraft: Bedrock Edition Worlds Lost When Using External Storage On Android Devices" in Minecraft Help), If you still cannot access the files in file manager, and you think it was supposed to be accessible but unintentionally made inaccessible, consider making a separate bug report under "Minecraft (Bedrock Codebase) (MCPE)", otherwise, consider making a feedback or upvote existing ones in Minecraft Feedback.
Additionally, for how uninstalling the game also deleted the world, to me, it's inescapable, you could choose to offload the app / game in settings, but it's not in topic in this report, maybe you want to make a feedback or upvote existing in Minecraft Feedback.
You cannot find your world's on bedrock anymore on mobile. It's terrible! Before I could make copies and save my worlds not anymore. No matter what advice it says none work. They need ro change it back. If you Uninstall the game all your world's are gone!