If you want to run Cyberpunk 2077 on Vega 8 graphics then you are going to have a hard time.
I tested the game with my Ryzen 5 2500U laptop to see what kind of performance I could achieve using a system that falls below the official minimum recommended specs.
Vega 8 graphics simply can't run Cyberpunk 2077 well enough to be playable. Even when dropping the resolution to 720p on the lowest settings, the system still struggles to keep a solid 30 fps without stuttering.
If you want to enjoy Cyberpunk 2077 then you will need a capable discrete graphics card at least as fast as the GTX 780 or the RX 470.
Specs for the laptop used in the video:
Model: Lenovo 330S-15ARR
Processor: Ryzen 5 (2nd Gen) 2500U - 2Ghz base clock
GPU: Integrated - Vega 8
Ram: 8 Gb (2400Mhz)
Storage: 128Gb SSD
Screen: 15.6" at 1920x1080p resolution
OS: Windows 10 Home