Basically every company have their own definition. For some companies, a SRE is just a traditional software engineer who happens to know how to use Kubernetes, where for others, a SRE is a "modern systems guy", with focus on IaC and automation.
Guess you're experiencing the same but regarding ML.
And then there are many companies where there are still silos, almost no automation, systems engineers are more focused on machines than the product and the company advertises SRE role- simply because its the trend.
Basically every company have their own definition. For some companies, a SRE is just a traditional software engineer who happens to know how to use Kubernetes, where for others, a SRE is a "modern systems guy", with focus on IaC and automation.
Guess you're experiencing the same but regarding ML.