When the "platform" is a cobbled-together mangle of CloudFormation, Python Lambdas, and Terraform. They call the people who did that SREs.
And by "They" I mean the Sales and HR people who get assigned to run engineering orgs at 100-200mm private businesses all over the US. AKA "Enterprise."
You would be surprised how few devops/platform engineers cannot write code that would get them a junior position for the code that runs on the platform.
Where people still follow old SysAdmin vs Dev silos. If you have follow checklists, open tickets, follow up on slack you are not really working on a platform, thus not a platform engineer either.
And by "They" I mean the Sales and HR people who get assigned to run engineering orgs at 100-200mm private businesses all over the US. AKA "Enterprise."