Many iFixit teardowns are contributed by community members - since iFixit doesn't have the time or money to teardown and make repair guides on everything, many are made by the community. That being said, you can request a device for iFixit to tear down [link|https://docs.google.com/forms/d/e/1FAIpQLSeQZZgrZWAUd4XjHHLm9e3R1sT8eJ27xENwEXP5tkCU5NE4DA/viewform|here|new_window=true].
If you want to learn more about contributing to iFixit, let me know in the comments below and I will be happy to point you to some resources.