Forums templates are located in the theme settings.

Why page templates and email templates are not there?

For me it's logical that the customisation should be treated as a theme thing.

I have realised this after doing the customisation of a theme, pages templates and email templates on localhost.

When I export the theme, pages templates and email templates do not follow.

Email templates have to be downloaded one by one.

And Pages templates are even worse, there is no download feature.

Exporting Pages templates is coming in a near future release.