Now we have super monsters well above the normal skysplit dude, like Harald, Xebec and Garp, who never have and never will. And some other cases like Oden and Roger/WB of the FB.
Xebec even solo skysplit, but never skysplit "classically".
Now what we can say Is that if Oda shows It, then we know the character can do It (obviously). However, Oda can just as likely don't draw the character doing It, but said character could still be absolutely able to and even well beyond the level of a normal skyplitter.