Phyno named brand ambassador for nigerian beer

I think you may be mistaken. Phyno is a Nigerian rapper and singer, but I couldn't find any information that suggests he has been named a brand ambassador for a Nigerian beer.

However, it's possible that you may be thinking of another celebrity or artist who has been appointed as a brand ambassador for a Nigerian beer brand. If you could provide more context or clarify which beer brand you are referring to, I may be able to help you better.