Hi Nanajbc,
We're glad you've reached out through Apple Support Communities for help with effects in FaceTime on your iPad Pro. We're certainly glad to help.
We've got a great resource to share with you. Let us know if the information in this guide helps, or if you've got any questions:
Add camera effects in FaceTime calls on iPad
It's important to note that while FaceTime effects are an option for your model of iPad Pro, the option to become Animoji or Memoji is compatible with iPad Pro models that include a TrueDepth camera, so this Animoji and Memoji option would not be supported on your device. You may still use stickers and other filters while in a FaceTime call.
Have a great day!