I can provide some general information about growth patterns during adolescence.
At the age of 15, many individuals, especially boys, are still experiencing growth spurts. Typically, boys continue to grow in height until around the age of 18-20, although the rate of growth may slow down after the age of 16.
Genetics play a significant role in determining a person's height. If your parents are relatively tall, there is a good chance that you may also experience additional growth in height.
While having a full-grown beard is one sign of physical maturity, it doesn't necessarily indicate that your height has reached its final potential. Growth rates can vary from person to person, and some individuals may continue to see gradual height increases beyond the age of 15.
If you have concerns about your growth and development, it's best to consult with a healthcare professional, such as a pediatrician or an endocrinologist. They can assess your growth trajectory, take into account your family history, and provide you with personalized information and advice. They may also order specific tests if necessary to ensure that your growth and development are proceeding as expected.