Not sure where you got the PETA bit from.

“Kangaroo meat is not technically banned for human consumption in the United States, but it is effectively prohibited due to a lack of federal inspection infrastructure and complex import regulations.”

https://www.chefsresource.com/faq/why-is-kangaroo-meat-banned-in-the-us/

Probably works better mixed in to a stew or a hot malaysian rendang or something

Should be more popular however the beef industry doesnt like it

Actually way more sustainable than beef or lamb