Kryonoglou sorry no I won't as that extension is replacing Flarum with a non-standard editor. Also it's a self-proclaimed proof of concept so I see no reason to try to support it given it might well break again in the future ?
Anybody's welcome to fork my extension to make it compatible with that editor though, assuming it's possible (I've not tried it).
I'm using an official Flarum method to inject text at the place of the cursor, so somebody could also update the WYSIWYG extension to correctly bind with that method, thus not needing any action from my side. I'm not sure whether the WYSIWYG extension is doing this or not, but I assume it's not if the emoji extension doesn't work with it.