I would bet The Man is up next, and I'd expect it in November. Lover hasn't peaked on radio, but it probably has peaked on the Hot 100. I don't think they'lI wait till January to push single #4.
I could see Miss Americana being single #5 and Cruel Summer as #6 if she can keep the album campaign going that long. Honestly, there's no reason she can't. If she's got the airplay support, the budget for big videos, and she commits to promo (and if she's not touring till next summer she's got the time) I could see her making this a long campaign.