I am on Plasma Wayland on openSUSE Tumbleweed. I have a bunch of custom compose combinations stored in ~/.XCompose. Some of these produce multiple Unicode codepoints, and some of them produce codepoints outside the BMP. If I enable the compose key without using an IME, I can only input the predefined compose combinations and not the custom ones I defined in ~/.XCompose, but if I switch to IBus or fcitx5 I can use the ones I defined in ~/.XCompose.
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