Hi!
Let me rephrase, I am looking for documentation that shows what iOS versions Apple would support, should there be any issues. Similar to an End of Life listing that Windows has for their OS.
Other websites like Wikipedia: https://en.wikipedia.org/wiki/IPadOS_version_history where it shows unsupported, supported, and current versions. iOS 16 is showing as unsupported, yet it received a security update this month. (which I believe was more for the iPhones that had an issue calling emergency services in Australia IIRC)
This request is mainly to show our users that the manufacturer does not support their devices so we can persuade them to upgrade to a more modern device. We do support any device as long as (in this case) Apple will also support it. For example, we support any iMac, Studio, or Macbook that can support the latest + the last two published macOS. Any device that cannot upgrade to a supported macOS would be marked for retirement. However we do not have any policies (yet) for iPadOS.