"raid_chunk_size" is not allowed for RAID pools and volumes:

----
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Unsupported parameters for (blivet) module: pools.raid_chunk_size. Supported parameters include: disks, encryption, encryption_cipher, encryption_key, encryption_key_size, encryption_luks_version, encryption_password, name, raid_device_count, raid_level, raid_metadata_version, raid_spare_count, state, type, volumes."}
----

Simple reproducer for pools:

----
    - name: Create a RAID0 device
      include_role:
        name: linux-system-roles.storage
      vars:
        storage_pools:
          - name: vg1
            disks: ["/dev/sdc", "/dev/sdd"]
            type: lvm
            state: present
            raid_level: "raid0"
            raid_device_count: 2
            raid_metadata_version: "1.0"
            raid_chunk_size: "1 MiB"
----