Miloš Petrović, thank you for posting this question here.
Based on the information available in the question, the "Agents" tab under "Insights" of Log Analytics workspace would meet your requirement. This contains the agents reporting data to Log Analytics Workspace, the Heartbeat trend (which is a small packet sent by the agent on VM every minute to the Log Analytics worksapce) and Agent catagory. The screenshot below shows this information:
You can also query the "Heartbeat" table in the "Log" section to get further insights as required. Some of the sample queries are available here - Sample log searches for Heartbeat
Hope this helps.
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