If, and only if, you are the owner of an experience, then you can edit it.
Editing an experience means being able to change everything that makes it up (title, comment, the experience itself and its publication).
On the other hand, the experience remains identified as such and will appear modified in future publications.
To delete it, you need to go back to the experience in question and instead of editing it, click on the mini-menu to the right of the edit button and then on delete experience.