Hi DonDaan11,
I'm struggling to find the update where it was mentioned here on the forums, but Dice did say that they were considering adding other maps. Potentially, we were able to access them too soon, and they've been subsequently removed.
- Casual Breakthrough launched on November 1 as a more relaxed way to experience Battlefield while still earning progression and completing challenges. Featuring smaller teams and Bot support, the mode gives players room to learn, experiment, and level up weapons. We are exploring additional maps for the rotation while keeping the balance between player and bot counts, and we are also considering a similar Casual Conquest mode for the future.
Link to notes on Reddit: Battlefield 6 - Community Update – Latest Updates Ahead of California Resistance : r/Battlefield
They did also say that they are looking at the possibility of adding more "Casual" modes, such as Conquest.