This blog demonstrates how you could apply different formatting to a person or group type of column in a SharePoint Online list. With column formatting a last name, first name format is applied.
Recently Tetsuya and Michel shared some great examples of a new option in List formatting. You can now use a setValue action within List formatting.
A while ago I came across an interesting question on the Power Users forum. The requirement was to trigger a flow based on a keyword in a Microsoft Teams channel message. In this example...