$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Radeon RX 5500 XT Driver on Gnu/Linux Distros

GNU/Linux Installing Radeon RX 5500 XT Driver

How to Install AMD Radeon RX 5500 XT Driver on GNU/Linux 64-bit desktops – Step by step Tutorial.

And there are 2 Radeon RX 5500 XT Linux Driver available Alternatives of AMDGPU: Proprietary and Open-Source.

Moreover, the AMDGPU Pro Software includes Support for Accelerated Graphics, MESA Multimedia, Pro OpenGL, Pro Vulkan and Pro OpenCL.

Especially relevant, the Setup is not Not Granted because the Latest Driver supporting a Device varies over Time, so before you should definitely check:

How to Install Radeon RX 5500 XT Driver on GNU/Linux Distros

GNU/Linux Radeon RX 5500 XT Graphics Driver Installation Guides