Ubuntu 22.04.1 autoinstall cloud-config fails

I'm currently having an issue installing Ubuntu 22.04 via cloud-init. The server has two hard drives. There should be a /data partition on the second hard disk, but currently, the installation doesn't work. Error message Does anyone have an idea what is wrong with the storage configuration?

#cloud-config
autoinstall:
  version: 1
  apt:
    geoip: true
    preserve_sources_list: false
    primary:
    - arches: [amd64, i386]
      uri: http://de.archive.ubuntu.com/ubuntu
    - arches: [default]
      uri: http://ports.ubuntu.com/ubuntu-ports
  users:
  - default
  - name: ubuntu
    passwd: "$6$rmFIz9Pdwb1$jsUGBTC46WkdnwLos4/6TqNnZaEdR7mV/XFfcvsnQXNKqgt.oZ2HTvboeZNP/qcNQXQqKkKnAU5i0Dh4GeAwA0"
    shell: /bin/bash
    lock-passwd: false
    ssh_pwauth: True
    chpasswd: { expire: False }
    sudo: ALL=(ALL) NOPASSWD:ALL
    groups: users, admin
  identity:
    hostname: ubuntu2204
    username: ubuntu
    password: "$6$rmFIz9Pdwb1$jsUGBTC46WkdnwLos4/6TqNnZaEdR7mV/XFfcvsnQXNKqgt.oZ2HTvboeZNP/qcNQXQqKkKnAU5i0Dh4GeAwA0"
  ssh:
    allow-pw: true
    install-server: true
  user-data:
    disable_root: false
    timezone: Europe/Berlin
  locale: de_DE
  keyboard:
    layout: de
  storage:
    config:
      - type: disk
        id: disk0
        grub_device: true
        wipe: superblock
        path: /dev/sda
        ptable: gpt
        match:
          size: largest
      - type: disk
        id: disk1
        path: /dev/sdb
        ptable: gpt
        match:
         size: smallest
      - type: partition
        id: boot-partition
        flag: boot
        device: disk0
        size: 500M
        number: 1
      - type: partition
        id: root-partition
        device: disk0
        number: 2
        size: -1
        wipe: superblock
      - type: partition
        id: data-partition
        number: 1
        device: disk1
        size: -1
      - id: boot-partition-fs
        type: format
        fstype: ext4
        volume: boot-partition
      - id: root-partition-fs
        type: format
        fstype: ext4
        volume: root-partition
      - id: data-partition-fs
        type: format
        fstype: ext4
        volume: data-partition
      - id: boot-partition-fs-mount
        type: mount
        path: /boot
        device: boot-partition-fs
      - id: root-partition-fs-mount
        type: mount
        path: /
        device: root-partition-fs
      - id: data-partition-fs-mount
        type: mount
        path: /data
        device: data-partition-fs
  late-commands:
    - echo 'ubuntu ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/ubuntu

Based on your configuration it appears you are installing onto a BIOS based device. I tried using your storage config and got the following error. To see this error message I opened a terminal in the installer environment and ran journalctl.

Stderr: Installing for i386-pc platform.
        grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
        grub-install: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
        grub-install: error: will not proceed with blocklists.

The error is telling you that you are installing onto a BIOS based device, using a GPT layout, but not creating a bios_grub partition. This will not work.

To quote from https://help.ubuntu.com/community/Grub2/Installing

installing GRUB2 on a GPT (GUID Partition Table) disk requires a dedicated BIOS boot partition with a recommended size of at least 1 MiB. ... It must be identified with a bios_grub flag.

You can add this to your storage config as the first partition.

      - type: partition
        device: disk0
        size: 4194304
        flag: bios_grub
        number: 14
        preserve: false
        grub_device: false
        id: partition-14