Did you know that every new Legion (Gen 6+) now support at least 100W PD charging over USB-C?
he latest generations can do even more, 135/140/170W with Lenovo's OEM chargers.

You don't need to carry the "brick" anymore everywhere you go!

For office workloads they are enough and perfectly fine.
You can even do light gaming using quiet mode.

Be aware that your cable must support (E-marker) the charging power (wattage) as well.
You need at least 45W (20V x 2.25A) for charging in sleep mode.
At least 65W (20V x 3.25A) for charging powered on.
Performance and custom mode won't be available, prefer using Quiet mode.