Not complete sure if this is the full solution, but it’s working for me now.
Looks like there was a change with the focus section. I changed focus={ props.focus } to isSelected={ props.isSelected } and the style format bar appears now.
“Riad Benguella [21 minutes ago]
Right! we inadvertently missed to add a backwards compatibility alternative for this one. You should replace the focus prop of Editable or RichText by isSelected”.