Bedrock needs a manifest.json in BOTH folders. Without this, your mod is a ghost.

"type": "data", "uuid": "<generate another UUID>", "version": [1, 0, 0] ,

If you are looking for a button that magically turns a Java mod into a Bedrock addon,

Create a new folder on your desktop called MyConvertedAddon . Inside, create exactly these two subfolders: