Where can I edit the text in deliver theme?

I would like to use the text in the footer.
In user/themes/deliver/templates/modular/footer.html.twig I can insert new elements.
In user/themes/deliver/scss/template/_footer.scss I can change the design.
But I can’t find the place where the content is for e.g. " site.contact.address "

can I edit the start post?

I have found it in the file user/config/site.yaml with the command: grep -rli “search string” * The content is only available via file system, not via admin.