AFAIK, even in China you're not required to do such except perhaps being a Uyghur in Xinjiang...

However, the PRC government is believed to have full access to popular apps like WeChat, among other surveillance tools.

If I were to do it, maybe I'd just ask phone makers to install such tools as system or ring-0 apps. Why would I give the people a chance to choose whether to participate in my mass surveillance scheme?