horizontal_rule not working

[iantearle]

Can't see this in the docs but appears in schema in code, but not working:

<button type="button"
        data-command="horizontal_rule"
        data-active-class="bg-red-400"
        class="bg-gray-300 p-1 rounded"
>Seperator</button>

[iantearle]

Just seen its not in nodes. Is it possible to activate it on the fly?