Considering bot champions [Client]

If i play co-op vs ai mode i have a chance to run into orianna bot for example or jhin bot or yasuo bot. If i try to create a custom game or a practice mode game and I want to add those bot champs, i cant because they arent available to add. They are not on the list of bots i can add.

How it should work. I should be able to add bots for champions that are available for co-op vs ai mode in custom games or practice mode games.