Thinking about it, there really isn’t anyone in charge of the galaxy at all in the Sequel trilogy, or at least nobody we know about from the films. The Senate is destroyed halfway through the first one without ever learning who led that body, and Snoke is killed a day or two later in TLJ without completing his conquest of the galaxy. Kylo is the de-facto leader after that, but he never really appears to lead the galaxy and is apparently looking for the real power behind Snoke this whole time. Then Palpatine emerges and becomes the de-facto leader of the galaxy using the shadow power structure of Pryde et al who really control the First Order. Then Palpatine dies a few hours after that along with Pryde, Kylo, and Leia. With the original leadership of the galaxy dead and the leaders of the Resistance and First/Final Orders dead, I guess the galaxy exists in a state of anarchy until the next warlord comes along with a salvaged planet-killing Star Destroyer.