Tick and cross icons (V for ok and X for not ok) have affordances problems.
In their black version they are still mistaken for UI clickable elements. Probably because they still share the same size and stroke-weight as the icon buttons.
- Bringing back the color and making them thinner and smaller might do the job.
- Using badges "Failed" and "Passed" for the webhook deliveries
- Use same icons as in field validation