How to resolve conflicts between Alt codes and application hotkeys?

I was trying Alt code.

From wikipedia, to enable it

a user must set or create a string type (REG_SZ) value called EnableHexNumpad in the registry key HKEY_CURRENT_USER\Control Panel\Input Method, assign the value data 1 to it, and then reboot or log out/in.

OK. That's great.

Now I can input some Unicode characters. For example, in Notepad, I can input © (U+A9) via Alt +Num ++ A9.

However, how can I input 🐙 (U+1F419) with the same method?

In Notepad (and most applications), the Alt + F has been bound as a hotkey (File Menu), which conflicts with F in U+1F419.

Is there any way to resolve such hotkey conflict on Windows? (by the simplest manner as much as possible)

Thanks.

P.s. I can copy-paste 🐙 in Notepad and display it no problem with font 'Segoe UI Emoji', so it is definitely not a font problem.