GNU/Linux Ubuntu 18.04 Installing Radeon RX 5600 XT Driver
Hi! The linked Tutorial shows you Step-by-Step How to Install AMD Radeon RX 5600 XT Graphics and GPU Driver for Ubuntu 18.04 Bionic LTS GNU/Linux.
And there are 2 Ubuntu Bionic Radeon RX 5600 XT 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 Ubuntu PPA.
Installing Radeon RX 5600 XT Ubuntu 18.04 Driver
How to Install Radeon RX 5600 XT Graphics and GPU Driver for Ubuntu
Amdgpu Pro Driver Ubuntu 18.04 Setup Guide