my bar for "DevOps" on my (SaaS) team is that the engineers responsible for the platform the product runs on are involved in the discussions about the product we build.

everything that comes after that: pipelines, testing, release engineering, migrations, post-mortems, whatever -- it's all a result of your infrastructure engineers having a stake in the thing your company is building. I have yet to see a definition of DevOps that invoked some sort of tech stack that made any sense to me. the processes and tools emerge from a cooperation between stakeholders and a shared responsibility for the delivered product.