That 512MB vRAM is referring to your IGPU Radeon Graphics from your Ryzen APU and not your GPU card. But the IGPU should still be able to run the game since Windows will automatically assign more System RAM to the vRAM of the IGPU.
Make sure to go to Windows Settings - Display - Graphics and select your GPU card to run your game and see if you still get that error message.
Also what is Device Manager showing? Any errors?
Go to these 3 gaming websites and see if your PC has the minimum requirements to run the game that you are having issues with:
System Requirements Lab.com - Can I Run It
PC Game Benchmark.com - Can I Run It
PC Builds - Can I Run It