are there she orcs??

[Son of Númenor]

True, but Tolkien didn't mention someone breeding Haradrim or Eagles, either.

Well, the word 'breeding' denotes sexual reproduction (e.g. a farmer breeding pigs, a family of rabbits breeding).'Breeding' cannot be done without sexual intercourse.

While it may not be 100% provable, unless you take The Silmarillion quote that The Saucepan Man provided as definitive, it is far more likely that orcs do breed (or are bred) than that they are somehow 'created' by Sauron when the need arises.