I bought new Laptop(Brand: Lenovo, AMD Ryzen 5700 U, ideapad 5-15ALC05 Laptop - Type 82LN) and installed windows 10, and Ubuntu 20.0.4 LTS both. But when I install Ubuntu system, all necessary drivers does not installed. For example Video Graphic drivers and Wireless etc.
I tried search in the Lenovo official website, but there are no such drivers for Ubuntu, only they provided windows drivers.

Where can I get proper drivers for Ubuntu version?

Thank you in advance