GNU/Linux Fedora 36 Install Radeon RX 6400 Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install AMD Radeon RX 6400 Graphics and GPU Driver in Fedora 36 GNU/Linux 64-bit Desktop.
And the Radeon RX 6400 Fedora Driver Support is the AMDGPU Software.
Moreover, the AMDGPU Driver supports all AMD Radeon GPUs based on the Graphics Core Next (GCN), Radeon DNA (RDNA), and Compute DNA (CDNA) architectures.
AMDGPU Fedora 36 Installation Guide