Nope, you are the one who has mistaken. Trump endorsed McCarthy for Speaker after the GOP won the house last November, and has been quite public about it since launching another Presidential bid. Here are some articles from DECEMBER 2022, which confirm that fact:
https://www.mercurynews.com/2022/11/14/trump-works-to-defend-mccarthy-as-he-eyes-24-bid/
https://freerepublic.com/focus/f-news/4117179/posts