Not possible to use drag and drop within Submenus in the canvas

[getdave]

Description

The ability to drag and drop menu items within submenus appears to be impossible within the canvas. It should be possible to achieve this.

Step-by-step reproduction instructions

1. Create submenus
2. Try drag and drop within

Screenshots, screen recording, code snippet

Screen.Capture.on.2024-12-20.at.10-22-26.mp4

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure