Blender is available in the Archlinux x86_64 repositories.
But Blender is not available in the Archlinux ARM aarch64 repositories.
You could go to the Archlinux ARM forum
Go to the “Packages” section and ask if they could include Blender in Their repos.
Otherwise, you would have to compile it for ARM aarch64. Compiling blender would probably be a long process.
Pudge