Can I use an Ipad and Apple Pay to make a purchase at a bricks and mortar store yet

iPads do not, yet, contain NFC capabilities for making contactless (Point Of Sale) payments using ApplePay - whereas modern iPhones do support NFC hardware for contactless payments.

For iPad, ApplePay is generally limited to eCommerce payments through a retailers website.

I hope you find this to be helpful in explaining the technical capabilities (and limitations) of iPad.

No.