The thread in question: https://www.reddit.com/r/Guildwars2/comments/ep6drp/that_shaman_this_keybind_wasnt_there_before/
Long story short, COVID interrupted their work on finishing it, though they said they were nearly finished. I'm not sure when ANet is returning (or if they have already) to work and in the meantime I wonder if this is something that will be part of the next expansion launch.