EX200 is availabe in v9 now. You can switch to v9 - you wont find sweeping differences between both.
Refer there the v9 exam objective : https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?...
If you want to know the difference between both version courses , take a look at the below summary :
RH124:
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All narratives, exercises, and labs are updated to Red Hat Enterprise Linux 9 syntax.
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The Red Hat Enterprise Linux introduction includes modern use cases and hybrid cloud computing.
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The GNU info command is removed based on feedback that indicates limited use.
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NetworkManager configuration file location changed starting in RHEL 8, and the network-scripts location is deprecated. The new configuration files use an INI format.
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Remote file copying now uses Secure File Transfer Protocol (SFTP). Secure Copy Protocol (SCP) is removed due to a security flaw, and is no longer recommended for production use.
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Package modules are temporarily deemphasized, because the earliest versions of RHEL 9 ship without software package modules while the module infrastructure continues to be built.
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Red Hat support information and sites are updated to include newer tools and locations.
RH134:
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Installing software now uses Simple Content Access for subscription management, which eliminates subscription attachment tasks and simplifies preparing registered systems.
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Kickstart is updated with new syntax and functionality.
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Modules are deemphasized in this update, but not removed. Engineering continues to develop the module infrastructure for RHEL 9, which will be delivered in a later RHEL 9 minor release.
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Starting in RHEL 9, training courseware uses dnf commands for RPM package management. Yum remains supported, and using dnf aligns RHEL with the upstream community.
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Network teaming is deprecated, due to a lack of upstream development, in favor of network bonding. The teamd service and the libteam library are deprecated in RHEL 9 and will be removed in the next major release.
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Firewall infrastructure based on iptables, and the ability to migrate iptables configurations to NFT is removed. NFT is now the default firewall configuration and method.
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The Access Control List chapter is removed based on feedback that indicates limited use.
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SSH root access is now disabled by default. RHEL 9 adds new options to the root password configuration screen to lock the root account and to allow root SSH login with password..
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Support for disabling SELinux through /etc/selinux/config is removed. SELinux can only be disabled through use of a kernel boot parameter.
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The exFAT filesystem is now supported for external USB storage and data exchange with other operating systems, especially Windows.
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VDO management is removed as a major topic, and is minimally introduced in the LVM overview, based on feedback that indicates limited use.
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The container content has been redesigned to discuss use cases, and to include the latest podman syntax.
