How to legally inherit property after a relative’s death?

My mother had a second marriage and she passed away in 2018. My father (my mother’s second husband) passed away in 2021, and my stepbrother passed away in 2022. My stepbrother had no siblings except me. His grandmother, who passed away in 2012, gifted her property to him in 2011. Using that gifted property, he entered into a joint venture with a property builder and acquired two flats. Now, since my mother, father (second husband), and unmarried stepbrother have all passed away, can I claim ownership of the two flats that are in my stepbrother’s name?