If you have Hyatt status you’re probably just using that to get MGM M life Rewards status every year. If you have status with any other hotel chain you can status match to Wyndham, which will get you status with Caesars, which can be matched to MGM M life Rewards.
However if you’re going for MGM status the usual way by earning tier credits with the casino resort chain, it’s worth knowing that Hyatt stays between August 18, 2019 and October 10, 2019 will earn MGM tier credits