Go to Settings
Then Privacy
Then Analytics & Improvements
Then select Analytic Data (after this pay attention to the following)
Search for something like - log-aggregated-2023-01-09-xxxxx.ips (not necesarily the same just similar it depends on the date that you are in also select the latest)
And export that info to a document where you can read the file and seach for one called battery life.
An easier way is just to download an app called coconutBattery (no endorsment) and follow the steps so you can check that info, other than that there is no actual simple way to check that since unlike the Iphones on the Ipads the function is not there.
Good luck on your search.
To check the battery health of an iPad, follow these steps:
Go to the "Settings" app on the iPad.
Tap on "Battery."
Look for the "Battery Health" section.
Here you will find the current maximum capacity of your iPad's battery, as well as its "Peak Performance Capability."
If the maximum capacity is less than 80%, this may indicate that your iPad's battery is in need of replacement. If the Peak Performance Capability is disabled, this means that your iPad has experienced an unexpected shutdown due to battery degradation and it is recommended to service.