iPad battery not holding charge

That's a 2017 iPad 5th generation.

It is ONLY 3 years old.

Seems very early for a battery failure, but...

I suggest contacting/reaching out to Apple Product support and services.

Tap on the first link below and scroll down some to get to the Apple Product Support section and phone numbers for your location/region.

https://www.apple.com/contact/

OR

https://support.apple.com/en-us/HT201232

If you need to, if initial 1st tier Apple customer support is of no help to you, you can calmly ask to have this issue escalated up to more responsible, senior level Apple customer support employees to see if they can come up with other possible advice/solutions to this iPad battery issues, but I make no guarantees, whatsoever.

If need be, you can have your iPad issues escalated all the way up the chain to Apple engineering level customer phone support.

Even if no acceptable resolution, Apple, AT LEAST, logs all support calls and issues.

Best of Luck to You!

What iPad kind/model do you own?

What is the “A” model number of your iPad?

The “A” model number of your iPad can be found on the lower area of the aluminium back of your iPad in small print letters right underneath the large, bold printed” iPad”.?