Its true. There were 2 very high ranking officers at FDA that resigned 2 weeks ago as well. The reason they cited for resigning was due to the political nature that is being entrenched into the vaccine and vaccine booster approval process at the agency. Its not just right now either with the current administration. They specifically stated that it was like this during the previous Trump administration too.
FDA has a very strict guideline and procedure for approving drugs and vaccines. They have followed this protocol for many, many years. When politicians start sticking their nose in there, problems occur.
There are numerous highly regarded experts criticizing Biden’s call for boosters. The CDC and WHO have both found no benefit for booster doses in healthy individuals at this time. The WHO has been adamantly against it for some time.