Check battery health on iPad like on iPhone How can I check the battery healthy of my iPad?
It's not the same as with my iPhone:

Settings → Battery → Battery Health

I haven't the Battery Health-Button in Settings → Battery on my iPad as I have it on my iPhone.

How can I check this on my iPad Pro? (Version 13.6)
Battery Health is currently not available for the iPad.
According to Apple Support,

For iPhone 6 and later, iOS 11.3 and later add new features to show battery health and recommend if a battery needs to be replaced.

Nowhere on the page does it mention iPad or iPadOS, so unfortunately, at this time, it's limited to iPhones running iOS 11.3 and later.
You may want to submit a feature request with Apple at https://www.apple.com/feedback/ipad.html