Luckily, there are a few ways to monitor your SSD’s health using SMART (Self-Monitoring, Analysis, and Reporting Technology) built into storage devices and software utilities that interface with it.
There is battery health data stored on your iPad, but you won't find it in the Battery menu. Here's a couple of ways to check it manually.
Most SSDs have their own software that can be used to monitor and manage SSD health. For example there is Samsung's Magician, and then the the Crucial Storage Executive for Crucial SSDs. These tools ...