It's using the Bool Tool Plugin
The tools belong to the Bool Tool plugin. They do not come with the vanilla B 2.80, you'll have to install a compatible version of the plugin.
You can find it here: https://gist.github.com/derappelt/603883d70a56c5d1f5080c2980bb5b9f
Then you should look for the Object menu, ath the bottom you'll find the BoolTool operators you were looking for:
