Jeopardy started the season with Mike Richards hosting the show and also as the executive producer. But he was fired after the first week for things he said in the past.
Therefore, the game show decided to split the hosting duties between Mayim Bialik and Ken Jennings for the rest of 2021. Since they are doing such a good job, Sony said they can finish out the season.
I am sure as soon as Call Me Kat is not renewed for a third season on Fox; Sony will make Bialik the full-time host with Jennings filling in only as needed.
When it comes to the EP of the game show, Michael Davies will continue in the role.