Brazil’s energy sector – Deregulation for retail energy market

Hello community.
 want to analyze how energy markets have opened up in countries similar to Brazil in size and energy sources.

My question is: which country with a free energy market can best help us compare with Brazil?

I’m particularly interested in countries that are similar to Brazil in terms of market size, energy sources, and challenges in the energy sector. Learning about their experiences could give us useful ideas about how Brazil might be affected by opening up its energy market.

Thanks in advance for any information or suggestions you can share.

Thank you!