To me SRE + Cloud means SRE is responsible for the cloud foundation/ platform but the software teams should be DevOps teams and they are responsible for the (micro)services they create. SRE helps out by providing the tools, libs, dashboard , general principles etc.

So SRE in responsible for the health of Kubernetes, networking etc and providing libs, support and infra but the DevOps teams are responsible for the health of the services/ software that is running on the cloud platform.

A DevOPs teams should not consist of developers and one ops person but the team as a whole is responsible for the stuff they create. They are on call just like SRE is, if something go's down SRE + DevOps work together to fix it