We have explain the option below, so please check once;
1. Page Builder Template:- This is for the page builder plugin when you use plugin to make a pages then you need select page builder template.
2. Portfolio:- This Templates Displays all the posts posted under portfolio posty type
3. Portfolio (Shortable):- This Templates Displays all the posts posted under portfolio posty type with shortable according to the Terms they are posted in.
4. Widgets only – No Left or Right :- This template display Widget only, not the page content as well as Left and Right sidebar.
No that is not the JetPack Portfolio it is the default portfolio, so for JetPack portfolio you need to install JetPack and should follow the steps which is shown in the documentation. And you can see the JetPack portfolio as in this image. We hope this will be helpful to you, if not then please let us know.