The following Azure features, have been used in development:
Azure - Function Apps (mostly http trigger with some timer and service bus triggers) - Logic Apps - Key Vault - Active Directory - Service Bus - Blob Storage / Storage Explorer - Application Insights - App Services - Virtual Machine Instances - Remote Developer Desktops - SQL - Cosmos
A good amount of DevOps - CI/CD - Pipeline / YAML - Git / Branch Mgmt - Project Service Connections