In Visual Studio Code and Sublime Text there is functionality called "Add Next Occurrence" that selects next occurrence of marked text. The keyboard shortcut for utilizing this function is CMD+D (CTRL+D on Windows and Linux).
This function would select the next occurrence of the text and also add another cursor to the end of the newly selected text.
How can I achieve this in Visual Studio for Mac?
Unfortunately, this is not currently supported. There is however an open suggestion to the team that you can up-vote if you would like to see this feature in an upcoming release.
Here is the link to the feature request: https://developercommunity.visualstudio.com/content/idea/351843/multiple-selection-with-the-keyboard.html