So it was recently brought to my attention that a Bangladesh-based pharmaceutical company called Square Pharmaceuticals makes a generic amenamevir. As far as I'm aware, Maruho (the makers of amenamevir) was granted a patent extension and amenamevir is still under patent.
Apparently Bangladesh has what's a called a "Least Developed Country" status which allows it to bypass pharmaceutical patent enforcements until 2033. They're able to make generic HIV drugs that are used all over the world. So once pritelivir is approved, if a Bangladeshi pharmaceutical company like Square understood the demand for pritelivir was high, they would likely start to make it.
As crazy as it sounds, I think the best form of "activism" would be to reach out to Bangladeshi generic pharma manufacturers and explain to them what pritelivir is and why they should make it. Then medical tourism to obtain it or buying it from online pharmacies actually becomes possible.
The FDA isn't going to help us here.