[Python] How to achieve two-level dropdown (nested categories) in Flask-Admin?

I’m building an admin console using Flask-Admin and I want my models to appear under a two-level dropdown menu.

For example, in the top menu I want a single item UI. When I hover/click it, I want a dropdown like this:

UI
├── UI-Tables
│ ├── ui_templates
│ ├── ui_components
│ └── ...
├── A-Series
│ ├── alpha_table
│ └── ...
└── Other
└── misc_table


Right now, Flask-Admin only supports one level of categories.

I tried doing this:

admin.add_view(ModelView(UItemplate, session, category="UI"))
admin.add_view(ModelView(UIcomponents, session, category="UI / UI-Tables"))


But this just flattens everything inside the dropdown, instead of showing it in a second nested level.

Question: Is there a way to achieve nested menus (category → subcategory → models) in Flask-Admin? Or do I need to customize the template to simulate a two-level dropdown?

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