As the title says, I don’t know if this is public knowledge or not. I know if you go to the Shop, an click on the new robot bartender, it says you can pre-purchase her, an she will be available by late August.
If you have unlocked her, you can go to Battlegrounds. Select “Collection” an go over to bartenders an set her to favorite. She will now replace Bob. Bob still talks at the end of a game lol. Most likely a bug, but kinda neat since the store mentions late August an we can use her now technically.