Hello,
You have waypoint events when creating a path via code (using the free version of DOTween), but not when using the visual editor of DOTween Pro. You could add them at runtime, by getting the generated tween and adding the callbacks to it, but it requires coding.
All in all, I think SWS might be more suitable for what you wrote, since it's completely focused on paths (contrary to DOTween Pro which also focuses on animations). And I'm pretty sure it has a visual editor feature for waypoints callbacks (but ask Baroni, the author, first, just to be on the safe side).
Cheers,
Daniele