Missing demo importer

Hi there,
We have installed the theme in a demo hosting in order to customize it before we go live.
Because of that we didn’t activate the theme.
When we install the theme we cant see the demo importer.
We must activate the theme? If so, when we go in our new domain we will activate it again or is there a “trial” activation until we make the customizations we want?
btw due to not activation the “arcanes types” plugin is also unavailable (cant activate it)
I also ask in your discord but no one reply…
Thank you in advance!