Clearly contributors here have absolutely no insight into what you may have already tried in attempting to identify and correct any potential issues with your iPad5. Being an older model, it will obviously not perform as well as much more recent models of iPad.
For information, here is a list of the highest version of iPadOS for your iPad5 and more recent models of iPad, noting that your iPad5 is incapable of supporting iPadOS 16 or later:
- iPad5, iPad Pro (9.7"/12.9" 1st generation) - iPadOS 16.7.10
- iPad6, iPad Pro (10.5"/12.9" 2nd generation) - iPadOS 17.7.3
Newer models are all able to be updated to the current version - iPadOS 18.2
- iPad Pro 13" (M4)
- iPad Pro 12.9" (3rd generation and later)
- iPad Pro 11" (1st generation and later + M4)
- iPad Air (3rd generation and later + M2)
- iPad (7th generation and later)
- iPad mini (5th generation and later + A17 Pro)
Starting at the beginning, if your iPad is not performing as expected, begin your troubleshooting with a forced-restart - as this will often clear an isolated software issue:
Force restart iPad (models with the Home button)
Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
If the problem persists after performing the restart, it may be necessary to reset your iPad settings. While this reset will not cause any loss of data, as a precaution, it is always wise to ensure that you have a current iCloud or iTunes backup before performing the reset:
How to back up your iPhone, iPad, and iPod touch - Apple Support
When you are happy to proceed, you can perform the reset from iPad settings:
Settings > General > Transfer or Reset iPad > Reset > Reset All Settings
If the problem still doesn’t clear, the next step is to reset the iPad to factory settings:
Restore your iPhone, iPad, or iPod to factory settings - Apple Support
Otherwise, you might be best advised to seek assistance directly from Apple Support and request a remote diagnostic test. You can contact the Support Team using the Support link at top-right or bottom-left of this page. Alternatively and perhaps easier, you can initiate and manage your support cases 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/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 test and assess your iPad - and you can explore your available options:
Genius Bar Reservation and Apple Support Options - Apple