Hi aspirant
May I inform you that BCECE exam has been scraped by JEE mains, and therefore no BCECE exam will be held your admission will be on the basis of your performance in JEE mains.
However, you do have to apply for the BCECE counseling process for seeking admission in one of the Colleges under BCECEB.
For more information you can refer to the following link below
https://www.google.com/amp/s/engineering.careers360.com/articles/bcece/amp