Unless you are able to restart your iPad to a running state - and successfully enter your Passcode - you'll not be able to recover any data from your iPad.
iOS/iPadOS devices are designed to protect the owners data - and prevent access to data by anyone other than its owner. iOS/iPadOS devices have an encrypted filesystem; successful entry of the correct Passcode unlocks the security chip within which the only copy of the encryption keys - that are required to access and decrypt your data - are stored.
Unless you have a pre-existing backup of your locally stored data, anything stored on your inaccessible iPad will remain beyond reach. However, any data that has been synchronised with iCloud may still be accessible from iCloud itself:
https://icloud.com
If you value your data, always keep a backup. Unless the iPad is unlocked, encrypted data cannot be accessed by iTunes to create a backup.
A forgotten or unknown iPhone/iPad passcode cannot be recovered - and neither can it be reset or modified from another device. If reset, all locally stored data will be automatically erased.