If you’re still having issues with it overheating, then the problem might be with the thermal paste on the GPU and/or CPU, though this is exceedingly rare. Thermal paste is a grease-like substance that goes between the dies on your processors and their attached cooling units to ensure maximum thermal conductivity. This can dry out and crack, which makes it so the contacts aren’t properly connected and therefore not sufficiently dissipating heat.
This is a moderately advanced bit of maintenance that could potentially void your laptop’s warranty. You should definitely consider contacting your laptop’s manufacturer for a repair or replacement before cracking it open yourself if possible.
To replace the thermal paste yourself, you’ll need to take off the bottom of your laptop. You might need specific tools to remove the screws if they don’t have standard Phillips head screws. After that, you will have to disconnect your battery and then locate your laptop’s heat sink and remove the screws holding it in place as well. Once the heatsink is off, you should see a gray paste on the heat sink itself and on the chips underneath. Use rubbing alcohol and a clean, non-static cloth like a coffee filter to clean off all of the paste from both sides. Then apply new thermal paste (like Thermal Grizzly paste from Kryonaut) in a clean line, spreading it with a credit card or plastic spatula so it covers the entire surface of the die. Finally, put the heatsink back on and reassemble your laptop.
If none of these solutions work, it may be time to consider customer service aid.