Crackdown hasn't stopped Chinese fentanyl from being produced or imported through the mail system.
And let's face it... peptides aren't killing people. Harm from peptides generally extends to the occasional forehead slapping case of an overdose. Which results in stomach flu-like symptoms.
If any squeeze was going to be put on, it'd be from political pressure from big pharma. Which, again, is going to be a tough sell. If people were routinely being injured from peptides, it would be a different story.