Info :
Easy Taming is a datapack that makes Horse , Donkey , Mule and Llama taming easy now , for example , when you mount a stray Horse , Donkey , Mule or Llama , The Animal will tame you straight away without declining your tame request.

How to add this datapack to your world :
1.Copy the folder called "Easy Taming" to the folder called "datapacks" in your world folder.
2.If you're in the world , type in "/reload".