Ever since signed shim binaries for multiple architectures became
available, the shim binaries installed in Linux distributions have
been renamed to include the EFI architecture in the binary names.

This started in Fedora, but is now used in openSUSE and Ubuntu too.

Reference for shim binary names comes from shim spec in Fedora:

https://src.fedoraproject.org/rpms/shim/blob/d8c3c8e39235507feb17b4e81851da087ae83c77/f/shim.spec#_23-32