Battery health is not an exact science.
Your iPad battery is rated to retain ~80% of its original capacity when new after 1000 full charge cycles. Simple math suggests that you might anticipate the indicated battery health to be reduced by ~1% for every 50 charge cycles. Assuming that your iPad has properly calibrated its battery monitoring algorithm, having exceeded 100 charge cycles, you might reasonably anticipate seeing a 2-3% reduction in overall battery health. You should note that this is not an absolute measurement - but is an estimate.
If you have any concerns for your iPad's battery health, you would be best advised to seek assistance directly from Apple Support - and request a remote battery diagnostic test. You can contact the Support Team using the Support link at top-right or bottom-left of this page.
Alternatively, you can initiate and manage your support cases from Apple devices using the excellent Apple Support App. If not already installed, the App can be downloaded from the App Store:
https://apps.apple.com/app/apple-support/id1130498044
You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to hands-on test your iPad:
Genius Bar Reservation and Apple Support Options - Apple