Ubuntu maker Canonical has spent the past several months exploring Ubuntu x86-64-v3 based images for leveraging the x86 64 micro-architecture feature level capabilities to target the level embracing AVX/AVX2, FMA, BMI2, and other instructions supported largely since Intel Haswell and AMD Excavator era processors
The Arch Linux based CachyOS Linux distribution aims to be a 'blazingly fast and customizable Linux distribution' that is aggressive with its performance optimizations.
While a number of Linux distributions are experimenting with x86-64-v2 baselines or offering x86-64-v3 optimized packages for assuming AVX/AVX2 support by default for their packages, the CachyOS Linux distribution has been experimenting with offering x86-64-v4 packages for those running on Intel or AMD systems with AVX-512 support.