Ganna’s position today is significantly different than the image above…mostly due to the 3D printed aerobars, he is actually a bit higher (not the riser height) and less stretched out (see forearm angle).
One point not mentioned above is hip rotation…you can keep similar hip angles to your road position if you properly rotate your hips. It is not about keeping similar contact points from your road bike and just moving the saddle forward, it is about hip rotation.