AFAIK they used different certificate for MITM. Currently they are using certificate mentioned in that bug to issue certificates for government websites (like https://elicense.kz/ ), so actually a lot of citizens who need to use government services have to install that certificate as a root anyway.

I don't think that they would use that certificate for MITM. They're not fools and they understand that it would lead to blacklisting it which would halt a lot of operations in the country.