The press freedom index places Burkina Faso, a country that bans journalists from visiting displacement camps, higher than the US, so I'm a little skeptical of its findings
The places the US does not let journalists access are countless. A prominent example are most of the US' border facilities, the detention-like migrant "housing" facilities among them.[1]
So what you brought up can clearly not be a differentiator between those countries in terms of such an index.
[1]: https://edition.cnn.com/2021/03/22/politics/biden-administra...
Edit:
To be fair to Burkina Faso I should point out that their 'displacement camps' are a case of taking care of people in need: refugees of war. Meanwhile the US facilities are just locking people up before sending them home.
- https://pressfreedomtracker.us/all-incidents/amid-backlash-d...
- https://theintercept.com/2019/08/30/guantanamo-bay-press-res...
If you're aware of more recent information, do share. As I said, this is just the results from a cursory search and may not reflect the current situation.