Briefs are written by Apple Intelligence on your device from the sources you follow, grouped by the interests set during onboarding. They appear on the Front Page each morning and require a device that supports Apple Intelligence.
If briefs are missing, check that Apple Intelligence is enabled in Settings and that Inkline has had a chance to sync overnight. Briefs are written from synced content, so a device that has been offline for days will produce a thinner brief until it catches up.
Still stuck? Back to the help centre or use the contact route there.