Conducting such games carries the hallmarks of cruelty. So not everyone will support such games. It can be administered temporarily in places where it is practiced according to tradition, but it is better not to encourage. But these games are difficult to add to any casino or gambling. As such cruel games are not supportable. It will not be acceptable in law either. So these games are not likely to be added to any casino or gambling platform. There are very few users who have directly enjoyed such games so we can avoid it easily. Horse racing is completely different because there is no chance of harm. It is supportable.
Certain countries will consider it a cruel game and should not be held for whatever reason. But for countries that have used this game as part of their local culture, it is not cruel because it is a cultural heritage that must be preserved. But there may be arrangements where cockfighting will be held because people will object to it if it is held in many public places. But maybe there are fiat-based online casinos that have included cockfighting in their list of games. Some users still want to bet on cockfighting so they can still visit these fiat-based online casinos.
I have heard from the history of my country that in the past cockfights were organized in different parts of our country. Although the game is not currently held but bull fighting is still held in different parts of our country but I don't know if any of these games are announced on any gambling site.