DE's at my company actually spend all their time making easy to use interfaces ontop of these tools (Github workflows, IaC/CI-CD solutions, Dev/SecOps features, etc.) so that DW/BI/DS Developers, or even analysts in some cases, can create new pipelines quite easily.
That sounds like infra ops, not data engineering. It's a common theme, though, for DEs to slip into maintaining infra and analysts taking on the role of engineering data pipelines.