Microsoft retains older builds for Enterprise customers via the (formerly MSDN) and the Volume Licensing Service Center (VLSC) . However, for the general public, Microsoft pushes the latest build (22H2) on its Media Creation Tool.
Before you double-click that setup.exe or restart your PC from your new USB drive, go through this final checklist to ensure you are prepared:
Organizations can download Enterprise editions of older builds through this portal. Community-Recommended Tools
Given these significant risks, it's crucial to ensure you have a valid and specific need for this legacy OS before proceeding.