I thoughts coaches aren't allowed to publicly acknowledge recruits until after they sign their LOI.
An athletics department staff member may take actions (e.g., "like," "favorite," republish, "tag," etc.) on social media platforms that indicate approval of content on social media platforms that was generated by users of the platforms other than ins utional staff members or representatives of an ins ution's athletics interests.
There is no prohibition by the NCAA on Carrington re-tweeting Earle's content.