How to get apple pay on a iPad mini 6

What iPad OS is your device on? iPads do not have NFC and thus cannot be used for in-store transactions. You’ll want to use Apple Safari as your web browser to get the best online shopping experience. Other browsers are hit or miss at accurately displaying Apple Pay purchase options online.

Apple Wallet is in the Settings app on iPad unlike iPhone which has a Wallet app.

Set up Apple Pay - Apple Support