Can I mine Malairte on a laptop?

Yes, with some care. Modern laptops have capable CPUs and many gaming laptops have decent GPUs, so they can mine MLRT. The two things to watch are heat and battery. Laptops have small cooling systems compared to desktops, so run on a hard surface, keep vents clear, and consider raising the back with a small stand. Always run on AC power, never on battery, and cap the power draw so the fans do not run flat-out continuously. Many laptop miners run only when the lid is open and the user is around, not 24/7. Treat it as a learning rig or an occasional contributor rather than a workhorse.