To edit a published post, click the More actions (three dots) icon next to the post title and select Edit post.
If you are trying to edit a draft or scheduled post, click the community name or logo in the top-left corner and select Posts. From there, hover over the post, click the More actions (three dots) icon next to the post, and select Edit post.
To delete a published post, click the More actions (three dots) icon next to the post title, select Delete post, and confirm the deletion.