Yeah he has some low level attacks that can do some kind of push, but nothing even close to Xebec, his attacks look like he's wielding a rocket launcher instead of a sword.
It being a low level attack doesn’t change that he can and has done it… it becomes more a matter of specialization than anything else.
For example zoro has only 1 known stabbing attack. Whereas Brook’s entire fencing swordsmanship is about stabbing, that’s literally the point of fencing.
Brook specializes in stabbing attacks compared to Zoro because that’s the point of his swordsmanship
So Zoro has a few shockwave attacks while Xebec uses them as his specialization the way Brook specializes in stabbing attacks.
Btw, we even have the opposite situation for Zoro. Zoro is the only swordsman who regularly switch the number of swords he uses in his sword combat as part of specialization. This is a thing ONLY ZORO DOES.
But notice that everyone else can also sort of do it. We’ve seen the scabbard switch to Oden’s 2 sword style when they were attacking Kaido. So they all have the capacity to be two sword style fighters, they just SPECIALIZE in one sword style combat while Zoro makes his ability to switch the number of swords he uses as his signature fighting style.
Similarly we have Oden who is a two sword style user that never uses 1sword style since that’s not his thing, though of course he knows how to use 1 sword