Throttling limit

The laptop will automatically downclock in order to keep the components below this limit. Performance will be lowered to keep it from overheating. No physical damage will occur.

1. 105c Ryzen / 100c Intel CPU
2. 87c for Nvidia

The only temperatures that really matter are the idle ones. You can check them using a free app like HWiNFO. Ideal is around 50c for both CPU and GPU

1. Laptop should be elevated, for example by using a laptop stand, or using a book to prop up the backside, etc. The point is to have enough space below the fan intakes on the bottom.
2. Make sure you are using the laptop on a flat surface. Do not place the laptop on a blanket, directly on your knees, on a pillow etc. That will both suffocate the fans, as well as add further insulation to keep the heat inside the laptop, which is a place where you do not want the heat to stay.
3. If the above doesn't help, cleaning the fans and the intakes can help. From personal experience, a difference between dusty and clean laptop can be up to 20c. Even if it may not look too dirty, the fan blades and the ribs of the heat sink are small enough that even a relatively small amount of dust that got through the dust filter can have a big impact.
When cleaning the laptop, follow the cleaning guide to prevent any physical damage. It's not difficult, but there are some tricks and quirks that need to be observed.
4. If cleaning didn't help, you can try replacing the thermal paste. Do it only if you know what you are doing. We have a guide for that, too. However, while repasting is normal after some time, it should never be needed on a brand new device. Legions should last several years until they need a new paste job.
5. If nothing above helps, you can turn to warranty. There could be a problem with the heatsink itself, in which case Lenovo should cover the replacement.