It appears to be so - I personally don’t have an iPad to check. Strange decision to omit it in that particular mode given it’s a parallel to iPhone keyboards, so I’d have to assume it was a deliberate omission. User experience (too many grandparents triggering it by accident)? Who knows.

Now we know we have to pinch it to make it float and then slide that way. TIL!

But if you’re using a newer iPhone, definitely able to slide as long as the owner haven’t turned it off.