After the chatbot/online assessments, there are typically 2 rounds in BCG hiring. In both the first round and the decision round, you will have 2 separate interviews - so 4 in total.
In general, I would not say the Middle East is increasing its hiring in Dubai. There is a push in BCG, and most other firms in the region, to hire in their other GCC offices, like Riyadh and Doha.
For BCG specifically, that they have filled their hiring slots for 2023. This is likely due to an influx of consultants from Russia who are staying in the Dubai office for a number of months before moving to other locations globally.
As Christian stated, reach out to BCG Dubai recruiting. They will have the latest information for you.