If you go on play live chess and click vs computer it will be rated or unrated depending on ur previous search, and the option is right there to change.
Hopefully it won't be more complicated on this new format ur talking about.
If you've recently played a bot, sure. Or if you know the bot name you want to play, sure. But if you click the vs Computer option, it takes you to the new section and that is not rated.
The problem is u can go on play live right now and vs bots in rated games right now.