The 5th Circuit dismissed a challenge to Trump's use of the Alien Enemies Act against alleged Tren de Aragua members after all plaintiffs were deported.
https://www.foxnews.com/politics/trumps-fight-rarely-used-18th-century-deportation-law-lives-latest-court-clash
https://www.foxnews.com/politics/trumps-fight-rarely-used-18th-century-deportation-law-lives-latest-court-clash