Everything I read says it’s a feature enabled in what ever compositor you choose, if your compositor supports it. Why isn’t there a general purpose keybinding program like setxkbmap? Does it just not exist yet or must it be built into the compositor?
I’ve read [this stackexchange thread] on something related but it all seems to be using XKB which should imply I’m using XWayland?
If you are using kde, then this feature is right in the settings menu. I have caps lock bound to compose. I dunno about other DE’s.