Generally speaking, aside from numerous Kennel Club or Cynological organization's breeding regulations for all registered dogs or breed specific breeding regulations that impact registration eligibility which can be located by reviewing articles contained in IPFD's Ethical and Breeding Guidelines section at http:///health-and-breeding/breeding/general-quidelines/, there are laws enacted by national, regional and local governmental bodies in different countries.
Restrictions on ownership and or management of breeds, including laws that impact husbandry practices utilized for breeding animals, exist - regulations are variable.
For a list of banned breeds by country (which may include breeding regulations pertaining to specific breeds) see: https://petolog.com/articles/banned-dogs/
For information on dog regulations/laws in effect in the United States see Michigan State University's Animal Legal and Historical Center's website. The article below provides access to numerous resources and regulatory information that impact commercial dog breeders and hobbyist breeders alike.
Also see this article : USDA wants dog breeder accreditation, Purdue center developing dog care standards, authored by Greg Cima