If you don't show up for your court date, the judge may issue a warrant for your arrest. This means law enforcement can arrest and bring you before the court. Additionally, your failure to appear may be considered contempt of court, which can result in additional fines and Penalties.
It's important to communicate with your criminal defense lawyer and the court if you can't attend your scheduled court date for any reason, as they may be able to help you reschedule or make alternative arrangements.