User347430248 posted
Hi byuan,
I try to again reproduce the issue and I find that I can also able to reproduce it on my side.

you can see the folders in Template zip file.
when I create project from that template, the folders are not available.

also I find that , when you export the template it is not immediately add the templates to the Visual Studio.
after trying many times , it start showing templates.
so its like an issue with VS 2017.
you can try to report this issue.
you can go to Help Tab in VS.
there is option to Report the issue.

Regards
Deepak