You can buy laptops with monitor panels capable of displaying the complete Adobe RGB gamut. As you’d expect though, such devices are not cheap.
You can also get laptops with monitor panels capable of displaying the complete sRGB gamut. As you’d expect though, such devices are not cheap but at least they’re not as expensive as Adobe RGB compliant ones. I have such a machine.
So, yes, laptops can deliver accurate colours.
However, the vast majority of laptops don’t get close to 100% sRGB coverage. So colour accuracy on most laptops is less than ideal.