It turns out that emoticons are considered a symbol, so they can beef up your passwords and make them more secure in combination with letters and numbers. Here’s how.
But it's actually possible to set a password with emojis anyways (or at least for domain accounts). I successfully logged in on a VM using the Hyper-V window and pasting the emoji from the host. You can also name an account a single emoji and windows actually handles it decently. It's very likely to break a lot of programs though.
Its worked on desktops for years and works right now. As someone else pointed out "win+." works as well. Or maybe its supposed to be the only way it works and mine is bugged? Idk. I found it via trying to lock my desktop and mistyping.
oh, I never tried. There goes that option. Wonder if that was intention to prevent people from trying to use emoji passwords because they didn't trust windows to handle it.
It's probably just because the emoji panel is a program and the lock screen has very limited or any capabilities to run any programs. And trying to make it the emoji panel to function on the lock screen is pretty much a waste of time anyways.