How are you deriving your iPad’s Battery Health? Unlike iPhone, your iPad does not have a Battery Health feature with which to make this measurement.
It’s interesting to note that in four months of ownership (and presumably regular use), you have only accumulated four full charge cycles? If this is indeed the case, this would suggest that the iPad is used almost exclusively while connected to its Power Adapter. While such usage is certainly possible - and will be at no detriment to your iPad - it may influence battery health as estimated by third-party utility software.
An iPad battery is rated to maintain at least 80% of its initial capacity after 1000 full charge/discharge cycles - whereas an iPhone is rated to have 80% of initial capacity after 500 full cycles.
There are third-party software packages available that can access battery cycle count. Popular choices for Mac are Coconut Battery and iMazing - whereas iMazing is available for PC.
https://www.coconut-flavour.com/coconutbattery/
If you are experiencing difficulties with your iPad battery holding charge, or you are concerned that battery performance is not as expected, you might be best advised to first have your iPad tested.
If you directly contact Apple Support - and explain your problem - you can request a remote battery diagnostic. The tests will confirm the status of your battery - and other elements of your iPad’s health.
Alternatively, a visit to the Genius Bar at your local Apple Store would provide opportunity for your iPad to be similarly tested by the Apple technicians - after which you can explore your available options.
Genius Bar Reservation and Apple Support Options - Apple
You can contact Apple Support using the Contact Support link at top-right of this page. You can also initiate a support case using the excellent Apple Support App; if not already installed on your iPad, the App can be downloaded from the App Store:
https://apps.apple.com/gb/app/apple-support/id1130498044