In order to pair your hearing aids to your iPad, first make sure your bluetooth is turned off on your phone. The hearing aids cannot be connected to both at the same time. Then, turn on your iPad's bluetooth and search for your hearing aids.
Go to: Settings > General > Accessibility > Hearing > MFi Hearing Devices.
Both hearing devices should appear. If not, try opening and closing the battery doors on your hearing aids.
Under [Devices], select both of your hearing aids. This will pair them to your apple device.
As long as your bluetooth is off on your iphone, you should be able to use your hearing aids with your ipad!
Hope this helps!