We use several tools such as DLM Dashboard, SQL Change Automation, Azure boards and others to support our dev ops. For SQL Server monitoring we have developed dashboard reporting around SQL Data Collections and Reporting Services. This uses the CMS to generate a list of servers which the reports run against. The benefits of this approach are the stability of using the proprietary Microsoft MDW as a source, instead of a custom developed or third-party solution, and the associated costs and on-going maintenance for those alternatives.
This solution also works for our external DBA customers. Reports are emailed each morning, for current status and also trending. This way we don't have to remote in to their network to know how their system is performing.

I also like the look of the dashboards (insights) for performance monitoring in Azure Data Studio - hopefully these will become a bit more user-friendly as currently they are pretty unwieldy to setup.