On CentOS 9 Stream, recent package update gives this:

[root@celebi ~]# yum -y upgrade shim*
Last metadata expiration check: 2:10:18 ago on Wed 27 Aug 2025 07:57:14 AM CEST.
Dependencies resolved.
====================================================================================================================================
Package Architecture Version Repository Size
====================================================================================================================================
Upgrading:
shim-x64 x86_64 15.8-2.el9 baseos 563 k

Transaction Summary
====================================================================================================================================
Upgrade 1 Package

Total download size: 563 k
Downloading Packages:
shim-x64-15.8-2.el9.x86_64.rpm 4.2 MB/s | 563 kB 00:00
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Total 4.1 MB/s | 563 kB 00:00
Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'yum clean packages'.
Error: Transaction test error:
file /boot/efi/EFI/centos/shim.efi from install of shim-x64-15.8-2.el9.x86_64 conflicts with file from package shim-ia32-15-15.el8_2.x86_64

[root@celebi ~]# rpm -qa | grep shim
shim-x64-15-15.el8_2.x86_64
shim-ia32-15-15.el8_2.x86_64
[root@celebi ~]# rpm -ql shim-x64-15-15.el8_2.x86_64 | grep shim
/boot/efi/EFI/centos/shimx64-centos.efi
/boot/efi/EFI/centos/shimx64.efi
[root@celebi ~]# rpm -ql shim-ia32-15-15.el8_2.x86_64 | grep shim
/boot/efi/EFI/centos/shim.efi
/boot/efi/EFI/centos/shimia32-centos.efi
/boot/efi/EFI/centos/shimia32.efi
[root@celebi ~]#