SCMP has become a CCP mouthpiece after Jack Ma bought it.
That being said, one is not being unreasonable to suspect their level of editorial independence could be influenced.
You only just have to open the SCMP front page to find them calling military deployments in a stadium near Hong Kong "drills", citing anonymous sources that say "they are not of concern" and quoting liberally from anonymous posters on Chinese message boards spouting hate.