Inconsistent UI display between iOS and macOS

[qjasn]

Description

Inconsistent UI display between iOS and macOS
macOS show the element,but ios not

Code example to reproduce the issue:

from flet import *


def main(page: Page):
    page.add(Row(
        controls=[
            MenuBar([SubmenuButton(
                content=Text("New"),
                leading=Icon(icons.ADD),
                on_focus=lambda e: print(e),
                controls=[
                    SubmenuButton(
                        content=Text("Function"),
                        leading=Icon(icons.FUNCTIONS),
                        controls=[
                            MenuItemButton(

                                on_hover=None,
                                content=Text("Function")
                            )
                        ]
                    ),
                    MenuItemButton(
                        content=Text("Equation"),
                        leading=Icon(icons.FUNCTIONS),
                        on_click=lambda e: print("add e"),
                        on_hover=None,
                    )
                ]
            )])
        ],
        alignment=MainAxisAlignment.END
    ))


app(main)

Describe the results you received:
What I see in the macOS:

What I see in the iOS

Describe the results you expected:
How I can make the display a same thing?

Additional information you deem important (e.g. issue happens only occasionally):
Almost 100% happen

Flet version (pip show flet):

0.19.0

Operating system:
iOS macOS

Additional environment details:
My macOS’s python version is 3.9.6,but my iOS flet app’s python version is 3.11.6,will this lead to the problem?

[ndonkoHenri]

MenuBar and co were introduced in v0.18.0. The Flet mobile app has v0.17.0, meaning it needs to be updated. It will be in the coming days.
Closing in favor of #2662