References to "project" versus "study" level access seem erroneous in the HEAL context where the concept of projects seems not to apply.
Data Availability explainer seems better suited to Discovery page help.
The current open access studies seems odd. The goal of the initiative is for as much data as possible to be open access, and if that goal is met, having a list like this in the documentation seems like a maintenance nightmare.
The profile page does not have a "You have access to the following projects" section. It says You have access to the following resources". This seems better suited to a "deep dive" in a profile page help section.
The use of the terms "external" and "FAIR" with respect to data sources or repositories seems off. From a user perspective, internal vs external means nothing, and they're probably assuming everything is FAIR. Plus, if a repository isn't expressly FAIR, are we not going to represent their data? I'm guessing the answer is no.