Can we have access to multiple azure data sources/subscriptions and create dashboard from single Grafana cloud pro account? Does Grafana Cloud Pro suffice it?

With free cloud account i can only connect to one data source not multiple data sources using Azure Monitor, can i connect to multiple data sources means multiple tenants from single Garafana cloud pro account?

Yes,

You can connect to multiple datasource on Grafana cloud. Are you still having trouble with this?