GNU/Linux Mint 20 Installing Radeon RX 5700 Driver
Hi! The linked Tutorial shows you Step-by-Step How to Install AMD Radeon RX 5700 Driver in GNU/Linux Mint 20.x Ulyana/Ulyssa/Uma/Una LTS Desktop.
And there are two Mint 20 Radeon RX 5700 Graphics and GPU Driver available Alternatives: the AMDGPU Pro and the AMDGPU Open-Source.
Moreover, the AMDGPU Pro Software includes Support for Accelerated Graphics, MESA Multimedia, Pro OpenGL, Pro Vulkan and Pro OpenCL.
Especially relevant, the Latest Driver supporting a Device varies over Time, so before the Setup you should check: AMD Radeon Drivers Support
Finally, for the Radeon Open Source Drivers on Repo See instead: How to Install AMDGPU from Mint PPA.
Installing Radeon RX 5700 Linux Mint 20 Driver
How to Install Radeon RX 5700 Driver in Linux Mint
Amdgpu Pro Driver Linux Mint 20 Setup Guide