Which Brand or Manufacturer does Apple RECOMMEND for a wireless charging pad for iPhone XR and Apple Watch?

This is a user to user support forum. Apple is not here and does not read or respond to any posts here.

Apple does not make recommendations for any specific third party accessories.

Closest thing to an endorsement you will find is Apple selling it in their store.

Apple sells both Belkin and Mophie Wireless Chargers at their Apple Store but any Qi Wireless Charger works with your iPhone and Apple Watch.