Are There Keyboard Shortcuts for Emoticons Available?

You might want to check out an Input Method Editor (IME), like fcitx5-mozc. It's mainly for typing in Japanese, but it often includes various emoticons, given how popular they are in that context. It could be a good fit for what you're looking for.

There are definitely options out there, but it really depends on your desktop environment or window manager. Different setups have varying levels of support for emoticon shortcuts. Could you share what you're using?

If you're using something like KDE or GNOME, those environments usually have built-in support for emoticons. In KDE, for instance, you can use Super + . to bring up a list. Definitely check your settings!