Samsung stopped updating this device years ago. Custom ROMs allow you to experience newer Android versions.
Moving to a custom ROM will wipe your device completely. Make sure to back up all photos, contacts, messages, and important files to your PC or cloud storage. samsung a8 star custom rom top
Here are the top custom ROM options for the Samsung Galaxy A8 Star (model variants A8 Star / A9 Star), with short notes to help choose: Samsung stopped updating this device years ago