A few things can explain it:

• It's a Premium feature. Free accounts see a preview with an upgrade option; the full facts and tips unlock with Premium.
• Your trip needs a country set. Cultural Guidance is matched to the trip's destination country — open your trip, tap Edit, and make sure a country is selected.
• We may not cover that country yet. We're expanding coverage over time. If your destination is missing, let us know and we'll prioritize it.